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Geology and mineral resources of the North Absaroka Wilderness and vicinity, Park County, Wyoming, with sections on mineralization of the Sunlight mining region and geology and mineralization of the Cooke City mining district, and a section on aeromagnetic interpretation
Willis H. Nelson, Harold J. Prostka, Frank E. Williams, James E. Elliott, Donald L. Peterson
1980, Bulletin 1447
SUMMARY The North Absaroka Wilderness is approximately 560 square miles (1,450 km 2 ) of rugged scenic mountainous terrain that adjoins the eastern boundary of Yellowstone National Park in northwestern Wyoming. The area was studied during 1970, 1971, and 1972 by personnel of the U. S. Geological Survey and the U....
The river and the rocks: The geologic story of Great Falls and the Potomac River Gorge
John Calvin Reed Jr., Robert Sumner Sigafoos, George Wescott Fisher
1980, Bulletin 1471
The Great Falls of the Potomac River has figured prominently in the purposes of men since prehistoric time. Long before John Smith reached the falls in 1609, groups of Indians from East and West met at this great river barrier to trade and perform ceremonies in honor of the spirit...
The geologic story of the Great Plains
Donald E. Trimble
1980, Bulletin 1493
The Great Plains! The words alone create a sense of space and a feeling of destiny a challenge. But what exactly is this special part of Western America that contains so much of our history? How did it come to be? Why is it different? Geographically, the Great Plains is an...