New Cretaceous Formations in the Western Wyoming Thrust Belt


Book Description

Westward equivalents of Bear River and Aspen Formations are divided into five new formations by two red-bed tongues of the Wayan Formation. The Hilliard Shale changes northward to sandstone of the upper part of the new Blind Bull Formation.







Geological Survey Circular


Book Description



















Monthly Catalog of United States Government Publications


Book Description

February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index