Pinkerton Trail Formation

Usage of Geologic Unit Name:
Pinkerton Trail Formation of Hermosa Group (AZ*,CO*,NM*,UT*)
Pinkerton Trail Limestone of Hermosa Group (CO,UT)
Pennsylvanian, Middle*
Geologic Province:
San Juan basin
Black Mesa basin*
Paradox basin*
Areal Extent:
Type Locality:
On Pinkerton Trail, for which unit is named, near D & RG Railway tracks, about 12 mi north of Durango, La Plata Co., CO (Wengerd and Strickland, 1954).
Subsurface reference section: in Shell No. 1 Bluff well in sec. 32, T. 39 S., R. 23 E., San Juan Co., UT (Baars and others, 1967).
Unit Name History:
Named (Wengerd and Strickland, 1954). Assigned to Hermosa Group (Wengerd and Matheny, 1958). Revised; Areal limits; Overview (Clair, 1958). Upper boundary revised; Subsurface reference section designated (Baars and others, 1967). Overview (Condon 1992). Areal limits (Huffman and Condon, 1993).

Wengerd, S.A. and Strickland, J.W., 1954, Pennsylvanian stratigraphy of Paradox salt basin, Four Corners region, Colorado and Utah: American Association of Petroleum Geologists Bulletin, v. 38, no. 10, p. 2157-2199.

Clair, J.R., 1958, Subsurface stratigraphy of the Pennsylvanian of the Paradox basin [Colorado Plateau], IN Symposium on Pennsylvanian rocks of Colorado and adjacent areas: Rocky Mountain Association of Geologists Field Conference Guidebook, no. 10, p. 31-46.

Wengerd, S.A. and Matheny, M.L., 1958, Pennsylvanian system of the Four Corners region: American Association of Petroleum Geologists Bulletin, v. 42, no. 9, p. 2048-2106.

Baars, D.L., Parker, J.W. and Chronic, J., 1967, Revised stratigraphic nomenclature of Pennsylvanian System, Paradox basin: American Association of Petroleum Geologists Bulletin, v. 51, no. 3, p. 393-403.

Condon, S.M., 1992, Geologic framework of pre-Cretaceous rocks in the Southern Ute Indian Reservation and adjacent areas, southwestern Colorado and northwestern New Mexico, IN Geology and mineral resources of the Southern Ute Indian Reservation: U.S. Geological Survey Professional Paper, 1505-A, p. A1-A56.

Huffman, A.C., Jr. and Condon, S.M., 1993, Stratigraphy, structure, and paleogeography of Pennsylvanian and Permian rocks, San Juan basin and adjacent areas, Utah, Colorado, Arizona, and New Mexico, IN Evolution of sedimentary basins, San Juan basin: U.S. Geological Survey Bulletin, 1808-O, p. O1-O44.

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Last modified: 1/7/2011