U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Espy
Map showing publication footprint
  • Usage in publication:
    • Espy tongue
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Green River basin
Publication:

Hale, L.A., 1961, Late Cretaceous (Montanan) stratigraphy eastern Washakie basin, Carbon County, Wyoming, IN Wiloth, G.J., and others, eds., Symposium on Late Cretaceous rocks, Wyoming and adjacent areas: Wyoming Geological Association Field Conference Guidebook, no. 16, p. 129-137.


Summary:

Named a tongue of Steele shale for exposures near Espy Ranch, sec 18, T19N, R88W, Carbon Co, WY in the Greater Green River basin. Composed of dark gray shale and lenticular sandstone. Averages 250 ft thick. Overlies Deep Creek sandstone (unranked) of Mesaverde formation; underlies Hatfield sandstone member of Mesaverde formation gradationally. Marine origin. Of Late Cretaceous, Campanian age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Espy Tongue*
  • Modifications:
    • Overview
    • Biostratigraphic dating
  • AAPG geologic province:
    • Green River basin
Publication:

Bader, J.W., Gill, J.R., Cobban, W.A., and Law, B.E., 1983, Biostratigraphic correlation chart of some Upper Cretaceous rocks from the Lost Soldier area, Wyoming, to west of Craig, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1548, 1 sheet.


Summary:

Assigned as tongue of Steele Shale. Overlies Deep Creek Sandstone Member (revised) of Haystack Mountains Formation of Mesaverde Group and underlies Hatfield Sandstone Member of Haystack Mountains. Recognized from Point of Rocks, Sweetwater Co, WY south to Wild Cow Creek, Carbon Co, WY, Greater Green River basin. Is of Late Cretaceous, Campanian age and within the BACULITES ASPERIFORMIS ZONE.

Source: GNU records (USGS DDS-6; Denver GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 03:55:50 PM MDT