GEOLEX

Summary of Citation: Sangre de Cristo

Publication:
Melton, F.A., 1925, Correlation of Permo-Carboniferous red beds
   in southwestern Colorado and northern New Mexico: Journal of
   Geology, v. 33, no. 8, p. 807-815

Usage in Publication:
Sangre de Cristo conglomerate

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Luis basin

Summary:
Revised in that Sangre de Cristo divided into the newly named Veta Pass limestone member (at base), "Lower Sangre de Cristo conglomerate," and the newly named Crestone conglomerate phase (at top). Veta Pass has a maximum thickness of 2,100 ft and consists of black limestone and shale with marine fossils. The "Lower Sangre de Cristo" has a maximum thickness of 7,500 ft. The Crestone is a very coarse conglomerate with boulders about 8 ft in diameter. Crestone has a maximum thickness of 5,500 ft. Is best developed near Crestone where it is at least 13,000 ft thick; neither contact exposed. Thins in all directions from Crestone. Of Pennsylvanian and Permian age. Is equivalent to Molas, Hermosa, Rico and Cutler formations of the San Juan region; of Magdalena, Abo, and Yeso formations of Las Vegas-Mora region; and of Weber and Maroon formations of Aspen district. Overlies Leadville limestone or pre-Cambrian granite. Cross section.

Summary of Citation: Sangre de Cristo

Publication:
Bachman, G.O., 1953, Geology of a part of northwestern Mora
   County, New Mexico: U.S. Geological Survey Oil and Gas
   Investigations Map, OM-137, 1 sheet, scale 1:48,000

Usage in Publication:
Sangre de Cristo formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Las Vegas-Raton basin

Summary:
Overlies Magdalena group. Basal part may be the lateral equivalent of upper part of Magdalena. Estimated to be 3,300 ft thick. Underlies Yeso formation locally. Yeso absent north of latitude 36 deg and at that point Sangre de Cristo underlies Glorieta sandstone member of San Andres formation. Of Pennsylvanian and Permian? age. Mora Co lies in southern Las Vegas-Raton basin. Geologic map. Measured sections.

Summary of Citation: Sangre de Cristo

Publication:
Bolyard, D.W., 1959, Pennsylvanian and Permian stratigraphy in
   Sangre de Cristo Mountains between La Veta Pass and Westcliffe,
   Colorado: American Association of Petroleum Geologists
   Bulletin, v. 43, no. 8, p. 1896-1939

Usage in Publication:
Sangre de Cristo formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	San Luis basin

Summary:
Type area proposed as east of Crestone town site, on west flank of central anticline between Crestone Needle on south and Eureka Mountain on north, Saguache Co, CO, San Luis basin, where it can be divided into a lower member and the Crestone conglomerate member (formerly called Crestone conglomerate phase by Melton, 1925). Overlies Minturn formation in Crestone area. Correlates with Maroon formation, or Madera formation, or Pass Creek sandstone. Is not divisible from Huerfano Park south to NM. Ranges from late Desmoinesian, [Middle] Pennsylvanian to Wolfcampian, [Early] Permian.

Summary of Citation: Sangre de Cristo

Publication:
Johnson, R.B. and Baltz, E.H., 1960, Probable Triassic rocks
   along eastern front of Sangre de Cristo Mountains, south-central
   Colorado: American Association of Petroleum Geologists
   Bulletin, v. 44, no. 12, p. 1895-1902

Usage in Publication:
Sangre de Cristo formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Las Vegas-Raton basin

Summary:
Unconformably underlies the newly named Johnson Gap formation at the type section at Johnson Gap in secs 19 and 20, T34S, R69E, Las Animas Co., CO in Las Vegas-Raton basin. Beds assigned to Johnson Gap have been mapped as part of the Permian and Pennsylvanian Sangre de Cristo formation.

Summary of Citation: Sangre de Cristo

Publication:
Sutherland, P.K., 1963, Paleozoic rocks, IN Miller, J.P.,
   Montgomery, A., and Sutherland, P.K., Geology of part of the
   southern Sangre de Cristo Mountains, New Mexico: New Mexico
   Bureau of Mines and Mineral Resources Memoir, no. 11, p.
   22-44

Usage in Publication:
Sangre de Cristo Formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised Areal limits	Palo Duro basin San Luis basin Estancia basin

Summary:
Sangre de Cristo Formation revised in report area, southern Sangre de Cristo Mountains, northern NM; lower contact changed. The arkose and red-bed sequence of Sangre de Cristo overlies Alamitos Formation (new, this report); the Alamitos is equal to the upper arkosic limestone member of Madera Formation as used by Brill (term Madera not used in this report). The author studied only lower part of Sangre de Cristo in a few localities and no attempt was made to fully describe its characteristics. Near Pecos (San Miguel Co in Palo Duro basin) boundary with the underlying Alamitos is gradational and the lower beds consist of coarse-grained, poorly sorted arkoses interbedded with red shales and siltstones. To north overlies upper Desmoinesian limestones but contact is covered. Locally in the southernmost Sangre de Cristo Mountain region, Sangre de Cristo Formation rests unconformably on older rocks. This is the case near Lamy (Santa Fe Co, Estancia basin) where the arkose and red-bed sequence rests unconformably on typical limestones of La Pasada Formation (new). Southwest of Las Vegas (San Miguel Co) rests directly on various earlier rock units, including the Precambrian. Conclusive proof is lacking, but author believes that a regional intertonguing facies relationship is likely in which the formation is locally unconformable on older rocks. Exact age of Sangre de Cristo is uncertain. Correlation chart, sections, geologic map.

Summary of Citation: Sangre de Cristo

Publication:
Johnson, R.B., 1969, Geologic map of the Trinidad quadrangle,
   south-central Colorado: U.S. Geological Survey Miscellaneous
   Investigations Series Map, I-558, 1 sheet, scale 1:250,000

Usage in Publication:
Sangre de Cristo Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Las Vegas-Raton basin

Summary:
Exposures in the Cucharas River canyon area, northeast of Walsenburg, Huerfano Co, CO in the Las Vegas-Raton basin formerly assigned by this author in 1958 to the Badito Formation are mapped as the Sangre de Cristo Formation. One of the facies of the Sangre de Cristo mapped in the Cucharas canyon, the red and gray conglomerate, arkose, sandstone, siltstone, shale, and gray limestone. Is overlain by Jurassic rocks of the Entrada Sandstone, Ralston Creek? and Morrison Formations undivided in the canyon. Assigned a Pennsylvanian and Permian age.

Summary of Citation: Sangre de Cristo

Publication:
Tweto, Ogden, 1983, Las Animas Formation (Upper Precambrian) in
   the subsurface of southeastern Colorado, IN Contributions to
   stratigraphy: U.S. Geological Survey Bulletin, 1529-G, p.
   G1-G14

Usage in Publication:
Sangre de Cristo Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Las Vegas-Raton basin

Summary:
Overlies newly named Proterozoic Y Las Animas Formation in subsurface of Las Animas Co, CO in Las Vegas-Raton basin in R.W. Lange No. 1 Government test well, type well of main part of Las Animas Formation. Assigned a Permian age.

Summary of Citation: Sangre de Cristo

Publication:
Lindsey, D.A. and Schaefer, R.A., 1984, Principal reference
   section for Sangre de Cristo Formation (Pennsylvanian and
   Permian), northern Sangre de Cristo Range, Saguache County,
   Colorado: U.S. Geological Survey Miscellaneous Field Studies
   Map, MF-1622-A, 2 sheets, scale 1:96,000

Usage in Publication:
Sangre de Cristo Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Principal reference Revised	San Luis basin	Sandstone Siltstone Conglomerate

Summary:
Principal reference section for Sangre de Cristo Formation and its Crestone Conglomerate Member designated as measured section northeast of Crestone in T23N, R12W, Saguache Co, CO in San Luis basin. Is divided at that locality into a lower member 607 m thick composed of red conglomerate, sandstone, siltstone and minor shale, and overlying Crestone Conglomerate Member 1,132 m thick composed of coarse conglomerate, conglomeratic sandstone, minor siltstone and shale. Sandstone of lower member may be cross-bedded to horizontally laminated. Conglomerates in lower member are disorganized clast and matrix supported. Some ripple cross lamination and current ripples in lower sandstones and siltstones. Fragments of plant fossils but no other fossils observed in lower member. Conglomerates in Crestone have chaotically-packed, angular to subround clasts up to boulder size of red syenite, pink to red porphyritic felsite, granite, and gneiss. Overlies Minturn Formation. Contact placed at top of coarse-grained, pink, medium-bedded sandstone that lies 23.8 m above a gray, fossiliferous, silty marker limestone. Top eroded. Regionally Entrada Sandstone is younger unit. Ranges from Atokan or Desmoinesian (conodonts; favor Desmoinesian lower member) to Desmoinesian to Wolfcampian (Crestone), or Middle and Late Pennsylvanian and Early Permian. Deposited as alluvial fan that extended into sea.

Summary of Citation: Sangre de Cristo

Publication:
Baltz, E.H. and Myers, D.H., in press, Stratigraphic framework
   of upper Paleozoic rocks, southeastern Sangre de Cristo
   Mountains, New Mexico, with a section * * * of Ancestral
   Rocky Mountains paleotectonics and Cenozoic structure: U.S.
   Geological Survey Professional Paper, __

Usage in Publication:
Sangre de Cristo Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Las Vegas-Raton basin Palo Duro basin

Summary:
Mapped in southeastern Sangre de Cristo Mountains, Mora and San Miguel Cos, NM, Las Vegas-Raton and Palo Duro basins. Crops out northward from Montezuma to edge of map along hogbacks, on Crestone anticline, in Chapelle syncline, in drainage basin of Pecos River, and in Las Gallinas and Las Dispensas synclines; occurs in subsurface of Las Vegas basin and Sierra Grande uplift. Consists mostly of nonmarine red, purple, and some greenish shale with interbeds of feldspathic to arkosic sandstone, pebbly arkosic conglomerate, and few nonfossiliferous, bedded limestones and limestone nodules. Maximum thickness is 2575 ft at Mora River; minimum thickness is 300 ft near Starvation and Tecolote Peaks; in subsurface thickness ranges from 180 ft on Sierra Grande uplift thickening northward to 2560 ft in Las Vegas basin. Isopach map (pl. 4); measured sections; fossil list. Overlies Alamitos Formation of Madera Group; conformably underlies Yeso Formation. Early Permian (Wolfcampian) age from south of Gallinas Creek to probably as far north as La Canada del Guajalote; farther north lower part is probably Late Pennsylvanian (Virgilian?) based partly on palynomorphs. Name Abo Formation should have been retained for Lower Permian rocks because of similar lithology, age, and stratigraphic relations to adjacent rocks as Abo of central NM, but Sangre de Cristo has been used in area since Read and others (1944, USGS Oil and Gas Invest. Prelim. Map 21).