U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Strode
Map showing publication footprint
  • Usage in publication:
    • Strode sand
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Sweetgrass arch
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. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

An informal unit in the lower part of the Ellis group on the Sweetgrass arch of north-central MT. Composed of sandy oolitic limestone. Probably of Middle Jurassic age. [Not identified in local measured sections.]

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 04:10:10 PM MDT