GEOLEX

Summary of Citation: Madison

Publication:
Peale, A.C., 1893, The Paleozoic section in the vicinity of
   Three Forks, Montana, with petrographic notes by G.P. Merrill:
   U.S. Geological Survey Bulletin, 110, 56 p.

Usage in Publication:
Madison formation*

Modifications:	Geologic Province:	Dominant Lithology:
First used	Montana folded belt province	Limestone

Summary:
First published use. No type locality or derivation of name given. Mapped with Quadrant formation north of East Gallatin River and on east? side of Missouri River, Gallatin Co, and west? side of Missouri River, Gallatin Co, MT in Montana folded belt province. Consists of a lower dark-colored, compact, fine-grained, fossiliferous limestone sequence 325 ft thick; a middle light-blue-gray, massive fossiliferous limestone, 350 ft thick; and an upper massive jaspery limestone 575 ft thick. Overlies Devonian Three Forks shales (new) and underlies Late Carboniferous Quadrant formation (new). Assigned to the Early Carboniferous (brachiopod, bryozoans, coral fossils).

Summary of Citation: Madison

Publication:
Darton, N.H., 1904, Comparison of the stratigraphy of the Black
   Hills, Bighorn Mountains, and Rocky Mountain Front Range:
   Geological Society of America Bulletin, v. 15, p. 379-448

Usage in Publication:
Madison limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Sweetgrass arch Montana folded belt province Central Montana uplift Powder River basin Williston basin

Summary:
Limestone of Mississippian age on the east side of the Bighorn Range given a local name, Littlehorn limestone, because the stratigraphic equivalency of the limestone with Pahasapa limestone of the Black Hills or with Madison limestone of MT uncertain. Is in the Sweetgrass arch, Montana folded belt province, Central Montana uplift, Powder River basin, and Williston basin.

Summary of Citation: Madison

Publication:
Collier, A.J. and Cathcart, S.H., 1922, Possibility of finding
   oil in laccolithic domes south of the Little Rocky Mountains,
   Montana, IN Contributions to economic geology, 1922; Part 2,
   Mineral fuels: U.S. Geological Survey Bulletin, 736-F, p.
   F171-F178

Usage in Publication:
Madison group*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Raised to group to include (ascending) Lodgepole (new) and Mission Canyon (new) limestones in the Little Rocky Mountains, Blaine and Phillips Cos, MT in Williston basin. Overlain unconformably by Ellis formation; underlain by Jefferson limestone. Mississippian in age.

Summary of Citation: Madison

Publication:
Nolan, T.B., 1930, Paleozoic formations in the Gold Hill
   quadrangle, Utah: Washington Academy of Sciences Journal, v.
   20, no. 17, p. 421-432

Usage in Publication:
Madison limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Revised	Great Basin province

Summary:
Recognized in the Gold Hill quad, Tooele Co, UT, Great Basin province as a dark gray (fresh) to light gray (weathered), thin-bedded (3 in to 1 ft) limestone. Thick-bedded limestone in top 10 to 15 ft where numerous dark chert nodules present. About 400 ft thick. Overlies Guilmette formation (new). Underlies Woodman formation (new). Of Early Mississippian age. [Usage here represents a far western limit for Madison.]

Summary of Citation: Madison

Publication:
Gilluly, James, 1932, Geology and ore deposits of the Stockton
   and Fairfield quadrangles, Utah: U.S. Geological Survey
   Professional Paper, 173, 171 p.

Usage in Publication:
Madison limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Revised Overview	Great Basin province

Summary:
Geographically extended to Tooele Co, UT, Great Basin province, where it is mapped (geologic map) in T5S, R4W, unconformably above the Middle? Devonian Jefferson? dolomite. A pebble bed (of dolomite and black chert) about 1 ft thick occurs locally at base of Madison. The basal unconformity is marked by a karst topography. Also, Madison is composed of bluish-gray limestone and can be distinguished easily from the underlying Jefferson? by the absence of mottling. Section 462 ft thick measured on ridge east of Buckhorn mine where the formation is a blue-gray limestone, individual beds of which may be fossiliferous, cherty, massive, blocky. Early Mississippian fossils (brachiopods, corals) listed. Stratigraphic table. Upper contact revised in that Madison conformably underlies the newly named Deseret limestone. Separable from limestone beds of the Upper Mississippian Deseret by an 8-9 ft thick black (fresh), red (weathered) shale with a phosphatic oolitic bed at top. The Madison-Deseret contact placed at the base of the black shale.

Summary of Citation: Madison

Publication:
Brainerd, A.E., Baldwin, H.L., Jr. and Keyte, I.A., 1933,
   Pre-Pennsylvanian stratigraphy of Front Range in Colorado:
   American Association of Petroleum Geologists Bulletin, v.
   17, no. 4, p. 375-396

Usage in Publication:
Madison limestone

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Denver basin

Summary:
Unconformably overlies Williams Canyon limestone (new name) rather than Beulah limestone (not used) in section measured 1 1/2 mi west of Beulah, Pueblo Co, CO, sec 5, T23S, R68W in Denver basin. Also unconformably overlies Williams Canyon north of Manitou, El Paso Co, CO, SW1/4 sec 32, T13S, R67W in Denver basin. Assigned a Mississippian age.

Summary of Citation: Madison

Publication:
Deiss, C.F., 1933, Paleozoic formations of northwestern Montana:
   Montana Bureau of Mines and Geology Memoir, no. 6, 51 p.

Usage in Publication:
Madison formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Montana folded belt province

Summary:
Revised by the naming of five new members which are, in ascending order, Silvertip conglomerate, Saypo limestone, Dean Lake chert, Rooney chert, and Monitor Mountain limestone members. Occurs on Lone Butte, Spotted Bear Mountain, Pentagon Mountain in Flathead Co and on Monitor Mountain in Lewis and Clark Co, MT, Montana folded belt province. Thickness ranges from 841 ft on Lone Butte to 420 ft on Spotted Bear Mountain. Unconformably overlies Jefferson limestones (revised); is youngest unit discussed. Measured sections; correlation chart. Assigned Early Mississippian (probably Kinderhook and Osage) age based on typical Madison fauna.

Summary of Citation: Madison

Publication:
Branson, C.C., 1937, Stratigraphy and fauna of the Sacajawea
   formation, Mississippian of Wyoming: Journal of Paleontology,
   v. 11, no. 8, p. 650-660

Usage in Publication:
Madison limestone

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wind River basin

Summary:
Revised in that lower part of Amsden formation (revised) is reassigned to newly named Sacajawea formation. Study area is in Wind River Mountains, Wind River basin. Madison disconformably underlies Sacajawea. Assigned Early Mississippian age.

Summary of Citation: Madison

Publication:
Sloss, L.L. and Hamblin, R.H., 1942, Stratigraphy and insoluble
   residues of Madison group (Mississippian), Montana: American
   Association of Petroleum Geologists Bulletin, v. 26, no. 3,
   p. 305-335

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin Powder River basin Central Montana uplift Montana folded belt province Sweetgrass arch Yellowstone province

Summary:
Divided into two formations in most of MT and parts of adjacent areas: the very massive Mission Canyon limestone, overlying the well-bedded Lodgepole limestone. Lodgepole is divisible into an upper member, Woodhurst (largely limestone with thin shale partings), and a lower member, Paine (with a much larger percentage of shale). Insoluble-residue analysis indicates that the formation and members of the group may be recognized by that means in a large area, and zones within the formation may be determined in limited areas. Shows correlation in two east-west lines of section across MT into the Dakotas. Describes insoluble residues and shows their characteristics in four samples sections, including sections at: Logan, Gallatin Co, MT in Montana folded belt province; Little Belt Mountains, Cascade Co, MT on Sweetgrass arch; Big Snowy Mountains, Golden Valley Co, MT on Central Montana uplift; and Little Rocky Mountains, Blaine Co, MT in Williston basin. Additional measured sections in Bridger Range, Gallatin Co, MT in Montana folded belt province; Quadrant Mountain, WY in Yellowstone province; Cooke City, Park Co, MT in Montana folded belt province; Pryor Mountains, Bighorn Co, MT in Powder River basin; and Gallatin Range, Gallatin Co, MT in Montana folded belt province. Overlain unconformably in surface sections by Amsden formation or younger rocks; overlies unconformably Three Forks formation or older rocks. Mississippian in age.

Summary of Citation: Madison

Publication:
Seager, O.A., 1942, Test on Cedar Creek anticline, southeastern
   Montana: American Association of Petroleum Geologists Bulletin,
   v. 26, no. 5, p. 861-864

Usage in Publication:
Madison limestone

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Revised in that Madison limestone overlain by Charles formation (new) of Big Snowy group (revised) in Williston basin of southeast MT.

Summary of Citation: Madison

Publication:
Cooper, B.N. and Prouty, C.E., 1943, Stratigraphy of the lower
   Middle Ordovician of Tazewell County, Virginia: Geological
   Society of America Bulletin, v. 54, no. 6, p. 819-886

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Central Montana uplift Montana folded belt province

Summary:
Fifty-four species of conodonts are recognized in a black shale member which occurs at base of Lower Mississippian Madison group over a wide area extending from AT and western ND to southwestern MT. On basis of conodont evidence, this horizon is correlated within the Kinderhook of the Mississippi Valley and adjacent areas. Collected from five localities, as follows: 1) Steveville oil field, AT; 2) Half Moon Canyon, sec 27, T12N, R18E, Fergus Co, MT on Central Montana uplift; 3) Boulder Creek, NW1/4 sec 5, T7N, R12W, Granite Co, MT in Montana folded belt province; 4) Head of Swimming Woman Creek, sec 32, T12N, R19E, Fergus Co, MT on Central Montana uplift; and 5) Jake Creek Canyon, sec 13, T10S, R33E, Beaverhead Co, MT in Montana folded belt province. Sections at collecting localities not given. Propose that this shale member be included as basal unit of Lower Mississippian Madison group for the following reasons: Kinderhook age of the conodont faunas; sharp separation from the underlying Devonian; and gradational transition to overlying dark shales and intercalated limestones of Paine member of the Madison [Paine Member of Lodgepole Limestone].

Summary of Citation: Madison

Publication:
Cobban, W.A., 1945, Marine Jurassic formations of the Sweetgrass
   arch, Montana: American Association of Petroleum Geologists
   Bulletin, v. 29, no. 9, p. 1262-1303

Usage in Publication:
Madison limestone

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Sweetgrass arch

Summary:
Unconformably underlies the newly named Sawtooth formation, basal formation of the Ellis Group (rank raised) in the subsurface of MT on the Bannatyne field (sec 8, T25N, R1E, Teton Co), Pondera field (sec 17, T27N, R4W, Pondera Co), Midway field (sec 32, T28N, R1W, Pondera Co), Cut Bank field (sec 3, T31N, R6W, Pondera Co and sec 27, T36N, R6W, Glacier Co), and Kevin-Sunburst Dome (sec 25, T37N, R3W, Toole Co), all on the Sweetgrass arch.

Summary of Citation: Madison

Publication:
Weller, J.M. and and others, 1948, Correlation of the Mississippian
   formations of North America: Geological Society of America
   Bulletin, v. 59, no. 2, p. 91-198

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin Central Montana uplift Montana folded belt province Yellowstone province

Summary:
Name Madison group and Madison limestone used in northern Rocky Mountains and northern Great Plains in the Williston basin, Central Montana uplift, Montana folded belt province, and Yellowstone province, including southwest and central MT, southeast ID, northwest and central WY, northwest and northern CO. Where used as a group, in MT and in Yellowstone National Park, includes (ascending): Lodgepole and Mission Canyon limestones, or Paine, Woodhurst, and Mission Canyon limestones. Briefly discusses correlations. Mississippian (Kinderhook and Osage) in age.

Summary of Citation: Madison

Publication:
Williams, J.S., 1948, Geology of the Paleozoic rocks, Logan
   quadrangle, Utah: Geological Society of America Bulletin, v.
   59, no. 11, p. 1121-1164

Usage in Publication:
Madison formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wasatch uplift

Summary:
Revised in that Madison overlies a newly named member of Jefferson formation designated in this report the Beirdneau sandstone member in Cache Co, UT on the Wasatch uplift. Geologic map.

Summary of Citation: Madison

Publication:
Laird, W.M. and Towse, D.F., 1951, Stratigraphy of North Dakota
   with reference to oil possibilities: North Dakota Geological
   Survey Report of Investigations, no. 2, 2 sheets, Revised.

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
States that Madison group, in ND, Williston basin, is represented by (ascending): Lodgepole, Mission Canyon, and Charles formations. [Charles Formation formerly the basal formation of overlying Big Snowy Group.] Overlain by Kibbey formation of Big Snowy group; underlain by Englewood formation. Mississippian (Osage) in age.

Summary of Citation: Madison

Publication:
Holland, F.D., Jr., 1952, Stratigraphic details of Lower
   Mississippian rocks of northeastern Utah and southwestern
   Montana: American Association of Petroleum Geologists Bulletin,
   v. 36, no. 9, p. 1697-1734

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wasatch uplift Montana folded belt province

Summary:
Designated Madison limestone at Leatham Hollow (NW corner sec 34, T11N, R2E), Cache Co, UT on Wasatch uplift where it unconformably overlies newly named Leatham formation and unconformably underlies Brazer limestone. At an 803 ft measured section at Leatham Hollow, the lower Madison includes 30 ft of gray to black, arenaceous, carbonaceous shale, the "Chinese Wall" 275 ft of hard, dark gray, dense, finely crystalline limestone, a slope forming dark gray, finely crystalline to sublithographic, thinly bedded limestone, and an "upper Chinese Wall" of gray, hard, medium crystalline limestone. Leatham section is fossiliferous, of Kinderhookian or Early Mississippian age. Another section measured east of Three Forks, MT (T2N, R2E) in Montana folded belt province where the Mississippian Madison group is divisible into Lodgepole and Mission Canyon limestones and where Madison unconformably overlies Sappington sandstone and unconformably underlies Amsden sandstone. Is fossiliferous at type. Lodgepole is Kinderhookian. Mission Canyon (not measured) is late Kinderhookian.

Summary of Citation: Madison

Publication:
Nordquist, J.W., 1953, Mississippian stratigraphy of northern
   Montana, IN The Little Rocky Mountains; Montana [and]
   southwestern Saskatchewan: Billings Geological Society
   Guidebook, no. 4, September, 1953, p. 68-82

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin Sweetgrass arch

Summary:
Revised in that Madison group is underlain by Bakken formation (new) in much of northern MT and ND (Williston basin and Sweetgrass arch), and adjacent parts of SA and MN. Possible hiatus at contact with Bakken. Mississippian (Kinderhook, Osage, and Meramec) in age.

Summary of Citation: Madison

Publication:
Andrichuk, J.M., 1955, Mississippian Madison group stratigraphy
   and sedimentation in Wyoming and southern Montana: American
   Association of Petroleum Geologists Bulletin, v. 39, no. 11,
   p. 2170-2210

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Many basins

Summary:
Includes (ascending) Lodgepole and Mission Canyon limestones and Charles formation in most of the region, and Englewood and Pahasapa limestones in Black Hills. Early, medial, and late stages of sedimentation may be differentiated on basis of lithologic cycles or sequences. Early sedimentation was characterized by deposition of the approximate Lodgepole formation and equivalents, Guernsey, Englewood, mad lower Pahasapa formations. Deposition commenced earliest in Williston basin and central Montana trough with the development of black shales, followed by dense limestone and shales; minor terrestrial to near-shore marine clastic sedimentation in the Black Hills area commenced somewhat later, preceding and accompanying the initial marine transgression on the Wyoming shelf. Widespread deposition of normal marine and fragmental oolitic limestones (mainly dolomitized equivalents in the shelf areas) occurred. Shoaling was prominent, and as a result local minor restricted deposition took place. Marine limestone and dolomite sedimentation, modified by 2 episodes of evaporite precipitation, occurred during medial Madison group time. Late sedimentation was characterized by restoration of normal marine conditions and development of a complex evaporite cycle (Charles formation, excluding basal evaporites). Shows correlation diagrams, and isopach and facies maps. Mississippian in age.

Summary of Citation: Madison

Publication:
McCourt, J.H., 1955, Reagan field, Glacier County, Montana, IN
   Lewis, P.J., ed., Sweetgrass arch-Disturbed belt, Montana:
   Billings Geological Society Guidebook, no. 6, p. 177-181

Usage in Publication:
Madison limestone

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Sweetgrass arch

Summary:
"Madison limestone" [also called Madison formation in report] Sweetgrass arch, divided into: 1) basal black noncalcareous shale 10-20 ft thick; 2) "Little Chief Canyon member"; 3) "Lodgepole formation," a gray to dark-brown argillaceous limestone and interbedded black calcareous shale containing abundant dark chert 150 ft thick; 4) "Mission Canyon limestone," a gray to cream, massive limestone, fragmental and fossiliferous, gray chert throughout, 680 ft thick; 5) "Sun River dolomite" (at top), a gray to buff-white dolomite and dolomitic limestone. Overlies Devonian Three Forks [formation]; underlies Jurassic Sawtooth formation. [Madison should have been group rank in this report.]

Summary of Citation: Madison

Publication:
Rothrock, E.P., 1955, South Dakota as an oil prospect, IN
   Guidebook; South Dakota Black Hills [3rd] field conference:
   North Dakota Geological Society Field Conference Guidebook,
   [no. 3], p. 76-80

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Williston basin Chadron arch

Summary:
Extended as a group in SD to include Englewood and overlying Pahasapa limestones in outcrops in the Black Hills in Williston basin and on Chadron arch. Includes (ascending): Bakken, Lodgepole, Mission Canyon, and Charles [formations] where encountered in wells in Williston basin. Mississippian in age.

Summary of Citation: Madison

Publication:
Chamberlain, V.R., 1955, Sub-surface carbonates of the Madison
   group in the Sweetgrass arch area, IN Lewis, P.J., ed.,
   Sweetgrass arch-Disturbed belt, Montana: Billings Geological
   Society Guidebook, no. 6, p. 78-84

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Sweetgrass arch

Summary:
Divided in the Sweetgrass area, MT (ascending order): 1) Lodgepole formation--which has the Paine at base--of Kinderhook age, and the Woodhurst member of Osage age; 2) the Mission Canyon formation of Osage age; and 3) the Sun River dolomite (top), of Osage, or Early and Late Mississippian age. This is the first published use of the term Sun River. The name was attributed to C. E. Erdmann, but the definition was never published by him.

Summary of Citation: Madison

Publication:
Fuller, J.G., 1956, Mississippian rocks and oilfields in
   southeastern Saskatchewan: Saskatchewan Geological Survey,
   Department of Mineral Resources (Regina) Report, v. 19, no.
   59, 72 p.

Usage in Publication:
Madison limestone

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Subdivided in southeastern SA into upper and lower parts of Madison limestone. Upper part of Madison limestone is further subdivided into (ascending): M.C.1 limestone, M.C.2 beds, Forget-Nottingham limestone, Kisbey sandstone, Hastings-Frobisher beds, Frobisher evaporite, Midale beds, Midale evaporite and Ratcliffe beds. These units are correlated by means of very widespread discontinuities in carbonate deposition during which sheets of shale, silt, sand, and evaporite were laid down. The clastic sheets, or "marker beds" are regarded as "time lines" [or time-planes]. Marker beds in the above sequence are the M.C.2 beds, Kisbey, Frobisher, and Midale. Discusses lithology, thickness, distribution, and facies relations of these units. Shows the extension of the M.C.1 limestone, M.C.2 beds, Forget-Nottingham, Kisbey, and Hastings-Frobisher into Bottineau Co, ND, in Williston basin. Additional evaporites appear in the sequence on the shoreward (eastern) side of the basin in SA and ND. These are named (ascending): Gainsbourgh, Carievale, and Auburnton-Huntoon evaporites. The first of these marks the base of Hastings-Frobisher beds, and the other two are intercalated within the Hastings-Frobisher beds [in ND]. Underlain by Bakken formation; overlain by "Charles" evaporites. Mississippian in age.

Summary of Citation: Madison

Publication:
Saskatchewan Geological Society, 1956, Report of the Mississippian
   Names and Correlations Committee: Saskatchewan Geological
   Society Field Trip Guidebook

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Proposed a system of nomenclature for use in the northeastern part of Williston basin including the southeastern corner of Saskatchewan and nearby parts of MN, MT, and ND. Divided into (ascending): Bakken formation, and Souris Valley, Tilston, Frobisher-Alida, Midale, Ratcliffe, and Poplar beds. Contacts of units above Bakken formation drawn at well-defined horizons--usually silty seams or evaporite beds--which have been used and illustrated by previous authors. Boundaries and correlations of units shown in four cross sections, which together include electrical, radioactive, and lithological logs of 34 wells. [Of these wells, two are in MT (Roosevelt and Sheridan Cos) and 13 are in ND (Williams, Burke, Renville, Bottineau, McHenry, and Wells Cos).] Cross sections show mechanical-log characteristics, and a four-fold classification of lithology, including 1) sparingly fossiliferous, dark siliceous fragmental limestones; 2) fossiliferous-fragmental limestones (in part shaly and siliceous; 3) algal, oolitic, pisolitic, and pellet limestones; and 4) evaporite anhydrite, halite, and dolomite, with some shale. Overlain by Kibbey formation or younger rocks; underlain by the Devonian Qu'appelle group of Baillie (1956). Mississippian in age.

Summary of Citation: Madison

Publication:
Strickland, J.W., 1957, Summary of Mississippian and Devonian
   stratigraphy, Wind River basin, Wyoming: Wyoming Geological
   Association Field Conference Guidebook, no. 12, p. 20-28

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Revised	Wind River basin

Summary:
Revised in that Madison group in Wind River basin is divided into "Upper Madison" and "Lower Madison" and Sacajawea (revised) is reduced in rank and is now assigned to Upper Madison as its uppermost member. Upper Madison is considered Meramecian age based on several lines of evidence including correlations with Brazer and Charles [formations]; presence of LITHOSTROTION corals; and common occurrence of basal breccia which is thought to represent a regional disconformity. Lower Madison is Kinderhookian and probably partly Osagean and correlates with Mission Canyon and Lodgepole formations of MT and "Madison" of the USGS in eastern ID and northern UT.

Summary of Citation: Madison

Publication:
Harrison, R.L., Jr. and Flood, A.L., 1957, Mississippian
   correlations in the International Boundary areas, IN First
   international Williston basin symposium: International
   Williston Basin Symposium Field Trip Guide, no. 1, Joint
   annual field conference of North Dakota Geological Society
   and Saskatchewan Geological Society, Bismarck, ND, October
   9-12, 1956, p. 36-51, Revised with title, Correlations in
   the Williston basin:  Canadian Oil and Gas Industries, v.
   10, no. 7, p. 79-88.

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Williston basin

Summary:
Introduces into northwestern ND in Williston basin, a system of nomenclature for subdividing Mission Canyon limestone and overlying Charles formation of Madison group, utilizing a notation established earlier in SA. Mission Canyon limestone is subdivided into five units numbered (ascending) Mc-1 through Mc-5. Charles formation is subdivided into eight units, numbered (ascending) C-1 through C-8. [The boundaries of the units are mechanical-log markers thought to be time-stratigraphic horizons that can be carried across facies boundaries over large areas in northwestern ND and neighboring parts of SA.] Describes lithologies of the subdivisions and shows their correlatives in a series of electric-log correlation diagrams. Producing horizons of oilfields in the area studied are indicated on the correlation diagrams. Mississippian in age.

Summary of Citation: Madison

Publication:
Anderson, S.B. and Carlson, C.G., 1958, Madison subcrop-Spearfish
   isopach map; Bottineau area [North Dakota]: North Dakota
   Geological Survey Report of Investigations, no. 30, 1 sheet

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Subdivided--in parts of Renville, Bottineau, and McHenry Cos, north-central ND, Williston basin--into radioactivity- and electric log units, or combinations of units, previously established for the Williston basin by Harrison and Flood (1956) and the Saskatchewan Geological Society (1956). These subdivisions are (ascending): Lodgepole formation; M.C.1 beds; M.C.2 beds; M.C.3 beds; M.C.4 and M.C.5 beds, combined (including C, bed of Harrison, Flood, 1956); Midale beds; Ratcliffe beds; and Poplar beds. Mechanical-log characteristics of these subdivisions are shown for the Carter-Phillips, G, Blower no. 1 well, SE1/4 SW1/4 sec 20, T160N [T161N], R83W, Bottineau Co, ND. Overlain unconformably by Spearfish formation; underlying rocks not described. Mississippian in age.

Summary of Citation: Madison

Publication:
Anderson, S.B., 1958, Study reveals Mississippi series possibilities
   [North Dakota]: World Oil, v. 147, no. 7, p. 136-144, Also,
   1959, North Dakota Geological Survey Report of Investigations,
   no. 31, 9 p.

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Williston basin

Summary:
Introduces into Williston basin of ND a time-stratigraphic terminology assembled from nomenclatural schemes used by petroleum geologists in SA. Certain marker beds selected from electric and radioactivity logs are used as boundaries for the time-stratigraphic intervals. The intervals are (ascending): Lodgepole, MC-1, MC-2, MC-3, Hastings-Frobisher beds, Midale beds, Ratcliffe beds, and Poplar beds. These units or intervals are superimposed on the conventional terminology of (ascending) Lodgepole, Mission Canyon, and Charles formations. The Mission Canyon and Charles formations [and to a lesser extent, the Lodgepole] are described as intergrading belts of lithology (or magnafacies) in which the contact between the Mission Canyon and overlying Charles formation is stratigraphically higher toward the west in Williston basin of ND. Use of time-stratigraphic units permits correlation across facies boundaries. Compares terminology with that of previous authors, including Anderson and Nelson (1956) and Harrison and Flood (1956) in ND. Shows electric-log correlation diagrams and facies relations in northwestern ND. Overlain unconformably by Spearfish formation or younger rocks; overlies conformably Englewood formation. Mississippian in age.

Summary of Citation: Madison

Publication:
North Dakota Geological Society, 1959, Mississippian Committee
   Interim Report: Geologram, v. 2, no. 4

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Divided in Williston basin, north-central ND, and southeastern SA into (ascending): Lodgepole, Mission Canyon, and Charles facies. Boundaries of these lithologic units are commonly crossed by units which are defined by [mechanical]-log deflections. A sequence of electric-log units is proposed for use in ND, in cooperation with the Saskatchewan Geological Society, and is shown on an accompanying correlation chart as (ascending): an unnamed unit; Tilston member; Frobisher-Alida member; Ratcliffe member, including the Midvale tongue at base; and Poplar member. Emphasizes that criteria for identification of the above-mentioned members are based on [mechanical]-log deflections, not on lithology. Marker-determined units may, and frequently do, occur in more than one facies. [Sample logs showing criteria for identifying the marker-determined units not shown.] Mississippian in age.

Summary of Citation: Madison

Publication:
Sando, W.J., 1960, Distribution of corals in the Madison group
   and correlative strata in Montana, western Wyoming, and
   northeastern Utah, IN Zapp, A.D., and Cobban, W.A., eds.,
   Geological Survey research 1960; short papers in the geological
   sciences; Articles 1-232: U.S. Geological Survey Professional
   Paper, 400-B, p. B225-B227

Usage in Publication:
Madison group*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Montana folded belt province Williston basin

Summary:
Shows distribution of coral zones in 8 stratigraphic sections--1 in UT, 2 in WY, and 5 in MT, in Montana folded belt province and Williston basin. Coral zones are (ascending): Zone A comprises lower 10-50 ft of Lodgepole in sections 4 and 5. Zone B includes beds in lower part of Lodgepole in sections 4 and 5, and is shown as lowest zone in sections 7 and 8. Zone C1 includes upper part Lodgepole in all four sections. Zone C2 is lowest zone in overlying Mission Canyon limestone. Boundary between C1 and C2 arbitrarily placed at top of Lodgepole, due to lack of data. Zone D includes upper part Mission Canyon and overlying Charles formation. The coral faunas do not provide satisfactory basis for detailed correlation with type Mississippian of Midcontinent region, because their sensitivity to depositional conditions appears to have given rise to different assemblages and distribution patterns in rocks believed to be nearly contemporaneous. Brachiopods associated with coral suggests tentative correlations with type Mississippian: Zone A entirely Kinderhook age. Beds equivalent to part of Kinderhook may be present in Zone B, and may extend into C1. Osage equivalents found in C1, C2, and D. Part of Zone D Meramec age. These correlations confirmed by distribution patterns of coral genera common to Madison and type Mississippian sequences.

Summary of Citation: Madison

Publication:
Anderson, S.B., Hansen, D.E. and Eastwood, W.P., 1960, Subsurface
   studies, IN Oil fields in the Burke County area, North Dakota;
   geological, magnetic, and engineering studies: North Dakota
   Geological Survey Report of Investigations, no. 36, p. 1-25

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Williston basin

Summary:
Introduces into northwestern ND, Williston basin, nomenclature based on mechanical-log correlations [as proposed by Smith, 1960 (abs.), Program 10th Annual Meeting, Rocky Mountain Section, American Association Petroleum Geologists, Billings, MT, p. 19] for the upper part of Madison group in Williston basin, ND. Subdivided into (ascending): Frobisher-Alida interval, including the Rivil subinterval at top; Ratcliffe interval, including the Midale subinterval at base; and the Poplar interval. Underlying rocks in Madison group had not been extensively drilled in Burke Co, and are not described. Revised boundaries and names of the units and subunits are compared with those proposed by Saskatchewan Geological Society (1956). The intervals are considered to be para-time-rock units, independent of facies. Shows mechanical-log characteristics of the intervals and subintervals and their correlations in five cross sections and in a sample well (Pan American, B. Staaleson no. 1, NW1/4, NE1/4 sec 6, T162N, R91W, Burke Co, ND). Discusses lithologic characteristics. Mississippian in age.

Summary of Citation: Madison

Publication:
Sando, W.J., 1960, Corals from well cores of Madison group,
   Williston basin [Montana], IN Contributions to general geology,
   1957: U.S. Geological Survey Bulletin, 1071-F, p. F157-F190,
   Revised in Journal of Paleontology, v. 35, no. 5, Sept. 1961,
   p. 1088-1089.

Usage in Publication:
Madison group*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin

Summary:
Corals from three wells in Wibaux, Dawson, and Roosevelt Cos, respectively, northeastern MT in Williston basin, are divided into three groups for facies analysis: nondissepimented solitary corals, dissepimented solitary corals, and colonial corals. Lateral changes in abundance, diversification, and vertical limits of coral fauna seem to be directly related to changes in lithic facies. The corals hold little promise as horizon markers because of strong facies control and the long stratigraphic range of the common genera. They offer greater potential for regional correlation because of the wide distribution of distinctive associations of genera and species in rocks of Early Mississippian age. Describes 24 species distributed among 18 genera, collected from the (ascending) Lodgepole and Mission Canyon limestones and the Charles formation. Shows frequency distributions and stratigraphic ranges of coral types or coral genera in the Madison group. Early Mississippian in age.

Summary of Citation: Madison

Publication:
Eastwood, W.P., 1961, Maps of the Frobisher-Alida interval,
   North Dakota: North Dakota Geological Survey Report of
   Investigations, no. 37, 3 sheets, scale 1:285,120

Usage in Publication:
Madison group

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Williston basin

Summary:
Shows correlations of the (ascending) Tilston, Frobisher-Alida, and Ratcliffe [mechanical-log] intervals in the middle part of Madison group in central part of Williston basin, ND in a detailed electric- and radioactivity-log correlation diagram extending from Renville Co, ND southward to Sioux Co, ND. Discusses lithologies and thicknesses with emphasis on the Frobisher-Alida interval. Electric-log characteristics of the intervals, and their subdivisions, including the Rivil subinterval at top of Frobisher-Alida interval and the Midale subinterval at base of Ratcliffe interval, are shown on a log of the Carter-Phillips, G. Blower no. 1 well, SE1/4, SW1/4 sec 20, T160N, R83W, Bottineau Co, ND. Mississippian in age.

Summary of Citation: Madison

Publication:
Mudge, M.R., Sando, W.J. and Dutro, J.T., Jr., 1962, Mississippian
   rocks of the Sun River Canyon area, Sawtooth Range, Montana:
   American Association of Petroleum Geologists Bulletin, v.
   46, no. 11, p. 2003-2018

Usage in Publication:
Madison Group*

Modifications:	Geologic Province:	Dominant Lithology:
Revised Reference	Sweetgrass arch Montana folded belt province

Summary:
Name Madison Group applied to Mississippian rocks in Sun River Canyon area, Teton Co, MT on the Sweetgrass arch and Lewis and Clark Co, MT in the Montana folded belt province, that lie above Devonian limestone and unconformably below Jurassic Ellis Group. These Mississippian rocks previously called Madison Limestone, Madison Group, and Hannan Limestone. Named Hannan abandoned. Madison Group divided into Allan Mountain Limestone (base) of Kinderhook and Osage age, and Castle Reef Dolomite (top) of Meramec age. Sun River is reduced in stratigraphic rank from formation (Chamberlain, 1955) to member as the upper member of Castle Reef. These local formations named because correlation of units in Sun River Canyon with units elsewhere uncertain. Reference section for Madison designated on north side of Gibson Reservoir in SE1/4 sec 36, T22N, R10W, Patricks Basin quad, Teton Co, MT. Is fossiliferous: corals, brachiopods, crinoids, and pelecypods. Assigned to Early and Late Mississippian.

Summary of Citation: Madison

Publication:
Maughan, E.K., 1963, Mississippian rocks in the Laramie Range,
   Wyoming, and adjacent areas; Article 66, IN Geological Survey
   research 1963; short papers in geology and hydrology; Articles
   60-121: U.S. Geological Survey Professional Paper, 475-C, p.
   C23-C27

Usage in Publication:
Madison Limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Overview	Greater Green River basin Powder River basin Wind River basin

Summary:
Equivalent to Mississippian rocks in Laramie Range and vicinity in Greater Green River, Powder River, and Wind River basins. Mississippian rocks in study area consist of basal arkosic conglomeratic sandstone unit, middle limestone unit, and an upper fossiliferous cherty or limestone unit. Basal sandstone is gradational with overlying limestone unit. Agatston (1954, AAPG Bull, v. 38, p. 508-583) found Kinderhook fossils in basal clastic unit near Farthing, WY, thus because of fossils and intertonguing with overlying typical Madison, basal clastic unit is assigned Mississippian (Kinderhook) age. Basal clastic unit correlates with a similar basal Mississippian unit in Rawlins, WY, area, Gilman Sandstone Member of Leadville Dolomite of central CO, Englewood Limestone of Black Hills, Bakken Formation of northern MT, and possibly Sappington Sandstone Member of Three Forks Shale in south-central MT. Basal clastic unit can be traced in the subsurface northeastward from Laramie Range into Hartville uplift area in east-central WY where it is probably represented by a clastic sequence beneath limestone of Guernsey Formation. Love and others (1953, USGS Oil and Gas Inv. Chart OC-44) date limestone near base of Guernsey as Late Devonian; thus basal clastic unit may transgress Devonian-Mississippian boundary between Hartville area and Laramie Range. Isopach map; cross section.

Summary of Citation: Madison

Publication:
Robinson, G.D. and Barnett, H.F., 1963, Geology of the Three
   Forks quadrangle, Montana, with sections on petrography of
   igneous rocks by H.F. Barnett: U.S. Geological Survey
   Professional Paper, 370, 143 p.

Usage in Publication:
Madison group*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Montana folded belt province

Summary:
Was recognized by Peale (1893) as a formation solely of limestone and 1,250 ft thick. Used as a group in same area. Divided into Lodgepole and Mission Canyon limestones in Gallatin, Broadwater, and Jefferson Cos, MT, Montana folded belt province. Section measured and described on Milligan Creek, sec 10, T1N, R1W where 600 +/-ft of Lodgepole and 900 +/-ft of Mission Canyon measured. Section measured in sec 4, T1S, R1W where 450 ft of Lodgepole limestone and about 150 ft of Mission Canyon measured. Lies between Three Forks shale above and Big Snowy formation below. Lodgepole is a marine, shallow-water, sublittoral to shallow neritic deposit. Fauna (brachiopods, corals, crinoids) assure assignment to Early Mississippian. Mission Canyon deposited under deep neritic conditions. Has fragments of brachiopods, corals, and crinoids. Assigned an Early Mississippian age. Geologic map.

Summary of Citation: Madison

Publication:
Ballard, F.V., 1963, Structural and stratigraphic relationships
   in the Paleozoic rocks of eastern North Dakota: North Dakota
   Geological Survey Bulletin, no. 40

Usage in Publication:
Madison Group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin

Summary:
Subdivided into five time-stratigraphic intervals in central part of Williston basin, ND as follows (ascending): Bottineau interval, including the Carrington shale facies at base (new); Tilston interval; Frobisher-Alida interval, including the Rivil subinterval at top; Ratcliff interval, including Midale subinterval at base; and Poplar interval. Describes lithologies and facies relations for each of the intervals in eastern ND. Shows relations to Lodgepole, Mission Canyon, and Charles facies [Formations]. Shows the electric-log markers that define the intervals and subintervals in the Carter Oil Co, E. L. Semling no. 1 well, sec 18, T141N, R81W, Oliver Co, in central ND. Compares nomenclature with that of some previous authors in Williston basin. Overlain unconformably by Kibbey Formation or younger rocks; underlain conformably by Bakken Formation, or where Bakken is missing, unconformably by older rocks. Mississippian (Kinderhook, Osage, and Meramec) in age, based on correlations with equivalent beds assigned these ages in Canada.

Summary of Citation: Madison

Publication:
Staatz, M.H. and Carr, W.J., 1964, Geology and mineral deposits
   of the Thomas and Dugway Ranges, Juab and Tooele Counties,
   Utah: U.S. Geological Survey Professional Paper, 415, 188
   p., (incl. geologic map, scale 1:31,680)

Usage in Publication:
Madison limestone equivalent*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Great Basin province

Summary:
Name Madison limestone equivalent, applied to some Lower Mississippian medium-gray limestone with chert in upper part, mapped in northern part of Dugway Range, Tooele Co, UT in the Great Basin province. Base of map unit placed at top of massive cliff-forming quartzite named Hanauer formation in this report. Top of map unit placed at base of gray, calcareous, thin-bedded siltstone of Woodman formation. Section 315 ft thick measured three-quarters of a mi north of Four Metals mine, northern Dugway Range, where the unit consists of white to medium-gray, fine-grained limestone. Upper bed at section is fossiliferous (brachiopods, cup corals, crinoid stems). Fossil collection from upper 10 ft thick quartzite bed (listed) is of Early Mississippian age. Age of lower part of Madison equivalent is unknown.

Summary of Citation: Madison

Publication:
Gries, J.P. and Mickelson, J.C., 1964, Mississippian carbonate
   rocks of western South Dakota and adjoining areas, IN Third
   international Williston basin symposium: International
   Williston Basin Symposium Field Trip Guide, no. 3, Joint
   annual field conference of Billings [Montana] Geological
   Society, 15th, North Dakota Geological Society, and Saskatchewan
   Geological Society, Regina, Saskatchewan, September, 1964,
   p. 109-118

Usage in Publication:
Madison Group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin Chadron arch

Summary:
Divides Madison Group in western SD in Williston basin and on Chadron arch into three operational units, following the informal subdivisions of Andrichuk (1975). These are a lower unit that is essentially the Lodgepole Limestone as that term is traditionally used; a middle unit that is Mission Canyon Limestone plus the deposits of the lowest evaporite cycle of the Charles Formation as defined by Seager (1942); and an upper unit that is the remainder of the Charles Formation. Shows correlation diagram, and thickness and facies maps for the three units in western SD, northwesternmost NE, and immediately adjacent parts of WY and ND. Mississippian in age.

Summary of Citation: Madison

Publication:
Billings Geological Society, 1964, Lower Mississippian correlations
   of eastern Montana, IN Third international Williston basin
   symposium: International Williston Basin Symposium Field Trip
   Guide, no. 3, Joint annual field conference of Billings
   [Montana] Geological Society, 15th, North Dakota Geological
   Society, and Saskatchewan Geological Society, Regina,
   Saskatchewan, September, 1964, p. 105-108

Usage in Publication:
Madison Group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin

Summary:
Expanded in eastern MT in the Williston basin to include Bakken Formation at base, overlain by (ascending) Lodgepole, Mission Canyon, and Charles Formations. Mississippian in age.

Summary of Citation: Madison

Publication:
Carlson, C.G. and Anderson, S.B., 1966, A look at the lower and
   middle Madison of northwestern North Dakota: North Dakota
   Geological Survey Report of Investigations, no. 43, 14 p.

Usage in Publication:
Madison Formation

Modifications:	Geologic Province:	Dominant Lithology:
Overview Revised	Williston basin

Summary:
Referred to as a formation and subdivided into upper, middle and lower parts in northwestern ND in Williston basin. Upper part includes the Poplar and underlying Ratcliffe intervals. Middle and lower parts include the undivided Frobisher-Alida, Tilston, and Bottineau intervals; five subintervals are recognized in the undivided interval. These are designated (descending): M2, M1, L3, L2, and L1. The middle part of Madison consists of subintervals M2 and M1 and the lower part of Madison consists of subintervals L3, L2, and L1. The intervals and subintervals are all informal marker-defined mechanical-log subdivisions. Shows marker horizons of the intervals and subintervals on a log of the Hunt Oil, C. Overlie no. 3 well, SW1/4, SW1/4 sec 30, T160N, R94W, Burke Co, ND. Describes the subintervals in the middle and lower parts of the formation and shows their correlation in lines of section in Divide, Burke, and Williams Cos, ND. Mississippian in age.

Summary of Citation: Madison

Publication:
Mallory, W.W., 1967, Pennsylvanian and associated rocks in
   Wyoming, IN Shorter contributions to general geology, 1966:
   U.S. Geological Survey Professional Paper, 554-G, p. G1-G31

Usage in Publication:
Madison Limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Bighorn basin Powder River basin Wind River basin Greater Green River basin Yellowstone province

Summary:
Amsden Formation or depending on location, its correlative, the lower part of Casper Formation, unconformably overlies Mississippian Madison Limestone. The hiatus between the Madison and the younger rocks is greater in the east part that in the west. Revised in that Madison underlies Horseshoe Shale Member (new name) of Amsden at the type Amsden at Amsden Creek, Sheridan Co, WY in Powder River basin, and Darwin Sandstone Member of Amsden at the reference section of Amsden in Tensleep Canyon, Washakie Co, WY in Wind River and Greater Green River basins, and in Yellowstone province.

Summary of Citation: Madison

Publication:
Sandberg, C.A. and Klapper, Gilbert, 1967, Stratigraphy, age,
   and paleotectonic significance of the Cottonwood Canyon Member
   of the Madison Limestone in Wyoming and Montana, IN Contributions
   to general geology, 1967: U.S. Geological Survey Bulletin,
   1251-B, p. B1-B70

Usage in Publication:
Madison Limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified locally Revised	Yellowstone province Bighorn basin Powder River basin

Summary:
Age modified locally where the newly named Cottonwood Canyon Member is assigned to the Madison Limestone, as its basal member in northern and south-central WY (Yellowstone province, Bighorn and Powder River basins). The Cottonwood Canyon is divisible into the lower tongue of Devonian age and the upper tongue of Early Mississippian age. Madison is of Late Devonian and Mississippian age.

Summary of Citation: Madison

Publication:
Craig, L.C., 1972, Mississippian System, IN Geologic atlas of
   the Rocky Mountain region, United States of America: Rocky
   Mountain Association of Geologists, p. 100-110

Usage in Publication:
Madison Group

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Williston basin Central Montana uplift Sweetgrass arch Powder River basin Yellowstone province Bighorn basin

Summary:
Used as Madison Group in SD, ND, and MT, Williston basin, Montana folded belt province, and Sweetgrass arch; includes (ascending): Lodgepole Limestone, Mission Canyon Limestone, and Charles Formation. Conformably overlies the Englewood Limestone, Bakken Formation, or older rocks; overlain unconformably by Kibbey Formation or younger rocks. Used as Madison Formation in northwestern, central, and part of southeastern WY (Laramie Range). In these areas, underlain by Devonian or older rocks; overlain unconformably by Amsden Formation or younger rocks. Mississippian (Kinderhook, Osage, and Meramec) in age. Shows correlations in Rocky Mountain region. Maps show the thickness and lithofacies of subunits of approximately Kinderhook, Osage, and Meramec ages, respectively.

Summary of Citation: Madison

Publication:
Love, J.D. and Albee, H.F., 1972, Geologic map of the Jackson
   quadrangle, Teton County, Wyoming: U.S. Geological Survey
   Miscellaneous Investigations Series Map, I-769-A, 1 sheet,
   scale

Usage in Publication:
Madison Limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Yellowstone province

Summary:
Madison Limestone crops out in eastern and northern parts in report area, Yellowstone province where it is divisible into a main part as much as 1,500 ft thick of Early and Late Mississippian age, and the Bull Ridge Member, 50-100 ft thick of Late Mississippian age. Rocks assigned to Bull Ridge in this report were variously called upper part of Mission Canyon Limestone, upper member of Madison Limestone, all or part of Brazer Limestone, Sacajawea Formation, strawberry beds, or basal part of Amsden Formation. Overlies Darby Formation. Underlies Darwin Sandstone Member of Amsden Formation.

Summary of Citation: Madison

Publication:
Sando, W.J., 1974, Bull Ridge Member of Mission Canyon Limestone,
   Beartooth Mountains, southern Montana, IN Cohee, G.V., and
   Wright, W.B., Changes in stratigraphic nomenclature by the
   U.S. Geological Survey, 1972: U.S. Geological Survey Bulletin,
   1394-A, p. A82-A83

Usage in Publication:
Madison Group*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Revised	Bighorn basin

Summary:
Bull Ridge Member can be recognized in the Beartooth Mountains of Park Co, WY and adjoining Carbon Co, MT in the Bighorn basin, as a member of Mission Canyon Limestone of Madison Group. Member can also be recognized in the Wind River, Owl Creek and Bighorn Mountains of the Wind River and Bighorn basins, where it is a member of the Madison Limestone. Bull Ridge ranges in Beartooths from 10 to 120 ft thick, and has the same lithic sequence and early Meramecian fauna as its type.

Summary of Citation: Madison

Publication:
Sandberg, C.A. and Gutschick, R.C., 1984, Distribution, microfauna,
   and source-rock potential of Mississippian Delle Phosphatic
   Member of Woodman Formation and equivalents, Utah and adjacent
   states, IN Woodward, Jane, Meissner, F.F., and Clayton, J.L.,
   eds., Hydrocarbon source rocks of the greater Rocky Mountain
   region: Rocky Mountain Association of Geologists Field
   Conference Guidebook, p. 135-178

Usage in Publication:
Madison Group*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wasatch uplift

Summary:
Includes Lodgepole Limestone of Kinderhookian and Osagean age and Mission Canyon Limestone of Meramecian age. Underlies a newly named unit, the Delle Phosphatic Member, basal member of the Aspen Range Formation, in North Georgetown Canyon, Aspen Range, ID in the Wasatch uplift. Correlation with lithostratigraphic units in the Great Basin province and Snake River basin shown on the correlation chart. Cross section.

Summary of Citation: Madison

Publication:
Nichols, K.M., 1984, Stratigraphy of the upper part of the
   Madison Group, Sawtooth Range, northwestern Montana, IN
   McBane, J.D., and Garrison, P.B., eds., 1984 field conference
   guidebook; northwest Montana and adjacent Canada: Montana
   Geological Society Annual Field Conference, 1984, p. 127-14

Usage in Publication:
Madison Group*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Sweetgrass arch Montana folded belt province

Summary:
Contact between Allan Mountain Formation (previously called Allan Mountain Limestone) and Castle Reef Formation (previously called Castle Reef Dolomite) of the Mississippian Madison Group, modified. Unit 23 of Mudge, 1972 (USGS Professional Paper 663-A, p. A93-A94) removed from lower member of Castle Rock and assigned to upper member of Allan Mountain. Terms lower member and Sun River Member of Castle Reef not used; Castle Reef divided into two informal units--Gateway Pass (base) and Dupuyer Creek (top). Principal reference section designated for Castle Reef on North Fork of Dupuyer Creek in NW1/4 NW1/4 SW1/4 sec 21, T27N, R9W, Walling Reef quad, MT. Is present throughout the Sawtooth Range, which is in the Montana folded belt province and Sweetgrass arch.

Summary of Citation: Madison

Publication:
Sando, W.J., Sandberg, C.A. and Perry, W.J., Jr., 1985, Revision
   of Mississippian stratigraphy, northern Tendoy Mountains,
   southwest Montana, IN Sando, W.J., ed., Mississippian and
   Pennsylvanian stratigraphy in southwest Montana and adjacent
   Idaho: U.S. Geological Survey Bulletin, 1656-A, p. A1-A10

Usage in Publication:
Madison Group*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Revised	Montana folded belt province

Summary:
Replaced in northern Tendoy Mountains, Beaverhead Co, MT in the Montana folded belt province by Tendoy Group (new). The group is divided into Paine Limestone, at base (formerly Paine Member of Lodgepole Limestone of Madison Group), Middle Canyon Limestone (extended from east-central ID), Mission Canyon Limestone (formerly of Madison Group in this area), and McKenzie Canyon Limestone (new). Tendoy Group is a newly recognized carbonate sequence near the craton margin. The group ranges in age from Kinderhookian to early Meramecian, the age range of the Madison. Stratigraphic chart. Correlation chart.

Summary of Citation: Madison

Publication:
Wardlaw, B.R. and Pecora, W.C., 1985, New Mississippian-Pennsylvanian
   stratigraphic units in southwest Montana and adjacent Idaho,
   IN Sando, W.J., ed., Mississippian and Pennsylvanian stratigraphy
   in southwest Montana and adjacent Idaho: U.S. Geological
   Survey Bulletin, 1656-B, p. B1-B9

Usage in Publication:
Madison Group*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Montana folded belt province

Summary:
Unconformably underlies Kibbey Sandstone, newly assigned to Snowcrest Range Group in southwest MT and east-central ID, Montana folded belt province. Correlation chart.

Summary of Citation: Madison

Publication:
Powers, R.B., 1986, The Willow Creek Fault, eastern Uinta
   Mountains; geologic analysis of a foreland subthrust play,
   IN Stone, D.S., and Johnson, K.S., eds., New interpretations
   of northwest Colorado geology: Rocky Mountain Association of
   Geologists Field Conference Guidebook, p. 183-190

Usage in Publication:
Madison Limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Piceance basin

Summary:
Represents entire Mississippian section in report area. Overlies Devonian Chaffee Formation (no evidence for Mississippian age) and underlies Molas Shale (changed from Molas Formation; areal extension) in subsurface of Moffat Co, CO in Piceance basin. [Nearby on outcrop of eastern Uinta Mountains, CO, Madison overlies Cambrian Lodore Formation and underlies Upper Mississippian Humbug Formation (base) and Doughnut Shale (top) which are mapped undivided.]

Summary of Citation: Madison

Publication:
Sando, W.J. and Sandberg, C.A., 1987, New interpretations of
   Paleozoic stratigraphy and history in the northern Laramie
   Range and vicinity, southeast Wyoming: U.S. Geological Survey
   Professional Paper, 1450, 39 p.

Usage in Publication:
Madison Limestone*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Revised	Denver basin Powder River basin Wind River basin

Summary:
Name applied to carbonate rocks in Natrona Co in the Wind River basin and in Converse Co in the Powder River basin conformably above the Englewood Formation and disconformably below the Darwin Sandstone Member (new affiliation) of the Casper Formation. Name also extended to Hartville area, Platte Co in the Denver basin to rocks above the Englewood and below the Darwin Sandstone Member (new affiliation) of the Hartville Formation. Was previously included in the upper part of the Guernsey Formation (a name not used in this report). Includes (ascending order): Big Goose, Little Tongue, and Bull Ridge Members previously recognized only in north-central WY. Is of Kinderhookian to early Meramecian, or Early and Late Mississippian age. Southeast WY was probably subject to a longer period of emergence than was the Bighorn Mountain area.

Summary of Citation: Madison

Publication:
Webster, G.D., Davis, L.E. and Wickwire, D.W., 1987, Lithostratigraphy
   and biostratigraphy of Early Mississippian strata of southeastern
   Idaho and northeastern Utah, U.S.A.: Courier Forschungsinstitut
   Senckenberg, v. 98, p. 179-191

Usage in Publication:
Madison Group

Modifications:	Geologic Province:	Dominant Lithology:
Not used

Summary:
Cottonwood Canyon Member, basal member of Lodgepole Formation [Limestone] of Madison Group, raised to formation rank in northeast UT and southeast ID on the Wasatch uplift because of its distinctive lithology. Sequence above Cottonwood Canyon, formerly also assigned to Lodgepole, reassigned to the newly named Henderson Canyon Formation in the northeast UT-southeast ID area. Name Lodgepole reserved for an unstable shelf, cyclical shallowing-upward deposit in MT and WY. The ID-UT rocks of the Henderson Canyon, which are equivalent to the Lodgepole, are deeper water deposits.