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A study of coal resources and their geologic occurrence in formations of Late Cretaceous and Paleocene age.
A résumé of the coal resources in an area of 1,100 square miles in south-central Colorado.
Prepared on behalf of the U.S. Atomic Energy Commission.
A study of the highly diverse igneous rocks and structures of a classic geologic area, with a discussion on the emplacement of these features.
A compendium of about 1,300 geological reports, maps, and statistical summaries.