GEOLEX
Summary of Citation: Jacque MountainPublication: Emmons, S.F., 1898, Description of the Tenmile district quadrangle [Colorado]: U.S. Geological Survey Geologic Atlas of the United States, Tenmile folio, no. 48, 6 p.Usage in Publication:
Jacque Mountain limestone*
| Modifications: | Geologic Province: | Dominant Lithology: |
|---|---|---|
| First used |
Eagle basin |
Limestone |
Summary:
First published use of name as top unit [unranked] of Maroon formation. Intent to name and designation of type locality not stated. Jacque Mountain, the geographic feature, lies in central part of quad in Summit Co, CO in the Eagle basin. Not mapped on geologic map. Is a bluish-gray limestone with oolitic grains in some layers that are embedded in a finely granular matrix of similar color. Oolites have sand grains as nuclei. Overlies unnamed part of Maroon. Conformably overlain by Wyoming formation. Has an invertebrate fauna of upper Coal Measure type. Of Carboniferous age.
Summary of Citation: Jacque MountainPublication: Brill, K.G., Jr., 1942, Late Paleozoic stratigraphy of Gore area, Colorado: American Association of Petroleum Geologists Bulletin, v. 26, no. 8, p. 1375-1397Usage in Publication:
Jacque Mountain limestone member
| Modifications: | Geologic Province: | Dominant Lithology: |
|---|---|---|
| Revised Overview |
Eagle basin |
Summary:
Designated a member of Battle Mountain formation in Eagle basin, Eagle Co, CO. Previously considered to be of formation rank. Is interval 210 at the type measured section of Battle Mountain formation where it is composed of light-gray, oolitic, fossiliferous limestone and breccia. Is 18 ft thick at the type Battle Mountain where it overlies and underlies unnamed parts of the formation. Forms a prominent cliff that may be traced from Kokomo to interstream divide east of Red Sandstone Creek. Is of Pennsylvanian age.
Summary of Citation: Jacque MountainPublication: Koschmann, A.H. and Wells, F.G., 1946, Preliminary report on Kokomo mining district, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 12, p. 51-112Usage in Publication:
Jacque Mountain limestone*
| Modifications: | Geologic Province: | Dominant Lithology: |
|---|---|---|
| Overview |
Eagle basin |
Summary:
Assigned as the uppermost unranked limestone of local usage (of four local limestones) to the middle unit of an unnamed sequence of Pennsylvanian age. Is exposed on the west slope of Jacque Mountain, Summit Co, CO in the Eagle basin. Consists of massive, prominent, blue-gray to dark-gray, oolitic fossiliferous (cephalopods, gastropods) limestone. Is usually one bed 15 to 25 ft thick. Limestone alternates with chocolate-colored shale in Searle Gulch. Fauna thought to be Desmoinesian age, but possibility of Permian age recognized. Overlies an unnamed red to maroon sandstone, mudstone, and conglomerate of the middle unit of the unnamed Pennsylvanian sequence. Underlies brick-red sandstone, mudstone, and conglomerate of the upper unit of the unnamed sequence of Permian? age. Geologic map. Stratigraphic table.
Summary of Citation: Jacque MountainPublication: Tweto, Ogden, 1949, Stratigraphy of the Pando area, Eagle County, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 4, p. 149-235Usage in Publication:
Jacque Mountain limestone member*
| Modifications: | Geologic Province: | Dominant Lithology: |
|---|---|---|
| Revised Overview |
Eagle basin |
Summary:
Here designated in the Eagle basin, a member of Minturn formation; top of Jacque Mountain is also top of Minturn. Represents a reassignment of it to Minturn from a member of Maroon formation (Emmons, 1898), and from Battle Mountain formation (Brill, 1942). Section measured on Radio Ridge described. Is one of the most persistent limestone beds of the Minturn. Is 15 to 25 ft thick, blue-gray to light-gray, fine-grained and oolitic limestone. Contains lenses of pink and gray intraformational limestone. Contains large coiled and straight cephalopods, large gastropods, and concentric algal colonies. Might be Pennsylvanian or Permian but author favors Pennsylvanian.
Summary of Citation: Jacque MountainPublication: Lovering, T.S. and Mallory, W.W., 1962, The Eagle Valley Evaporite and its relation to the Minturn and Maroon Formations, northwest Colorado, IN Geological Survey research 1962; short papers in geology, hydrology, and topography; Articles 120-179: U.S. Geological Survey Professional Paper, 450-D, p. D45-D48Usage in Publication:
Jacque Mountain Limestone Member*
| Modifications: | Geologic Province: | Dominant Lithology: |
|---|---|---|
| Age modified Overview |
Eagle basin |
Summary:
As the uppermost member of the Minturn Formation is a critical unit used for separating the Minturn Formation of Des Moines or younger age from the Maroon Formation of Pennsylvanian and Permian age. Tongues westward in Eagle basin into Eagle Valley Evaporite (a new unit).
Summary of Citation: Jacque MountainPublication: Schenk, C.J., 1992, Stratigraphic correlations between the Eagle Valley Evaporite and Minturn Formation, Eagle basin, northwest Colorado, IN Evolution of sedimentary basins; Uinta and Piceance basins: U.S. Geological Survey Bulletin, 1787-GG, p. GG1-GG8Usage in Publication:
Jacque Mountain Limestone Member*
| Modifications: | Geologic Province: | Dominant Lithology: |
|---|---|---|
| Revised |
Eagle basin |
Summary:
Can be traced west in six measured sections from type Minturn Formation to Avon, Eagle Co, CO and across Wolcott syncline where name Eagle Valley Evaporite is used. Is assigned to Eagle Valley as a member--Jacque Mountain Limestone Member--in area from Avon west. Some place the top of the Eagle Valley at the top of Jacque Mountain, but this author places the upper Eagle Valley contact much higher at the top of the uppermost gypsum. Overlies and underlies unnamed clastic sequences of Eagle Valley. Is of Middle Pennsylvanian age.