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Geology of the Yakataga district, Gulf of Alaska Tertiary province, Alaska
Don John Miller
1961, Open-File Report 61-102
This map of the Yakataga district is one of five maps at the same scale, showing the geology of the Gulf of Alaska Tertiary province (see index map). In this province, an accurate belt more than 300 miles long and 2 to 40 miles wide, sedimentary rocks of Tertiary age...
Geology of uranium in the Chadron area, Nebraska and South Dakota
Robert Jacob Dunham
1961, Open-File Report 61-42
The Chadron area covers 375 square miles about 25 miles southeast of the Black Hills. Recurrent mild tectonic activity and erosion on the Chadron arch, a compound anticlinal uplift of regional extent, exposed 1900 feet of Upper Cretaceous rocks, mostly marine shale containing pyrite and organic matter, and 600 feet...