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Ground-water resources of the Alma area, Michigan
Kenneth E. Vanlier
1963, Water Supply Paper 1619-E
The Alma area consists of 30 square miles in the northwestern part of Gratiot County, Mich. It is an area of slight relief gently rolling hills and level plains and is an important agricultural center in the State.The Saginaw formation, which forms the bedrock surface in part of the area,...
Investigations of the principal fluorspar districts of Mexico
Ralph Erskine Van Alstine, Samuel Estrada, Ernesto de la Garza
1963, Open-File Report 63-124
As a result of the increasing need for fluorspar, especially in North America, the Mexican fluorspar industry expanded greatly is the 8-year period, 1952-1960. Since 1956, Mexico has been the world's largest producer and exporter of this commodity. From 1956 through 1959 Maltice imported about 90 percent of the fluorspar...
Stratigraphic sections and correlation of beds in the Inyan Kara Group and Morrison Formation, north end of the Black Hills, Crook County, Wyoming, and Butte County, South Dakota
W. J. Mapel, C. L. Pillmore
1963, Open-File Report 63-88
Descriptions of 47 stratigraphic sections of the Ivan Kara Group and Morrison Formation are given for an area extending from bluffs on the west side of the Belle Fourche River in T. 56 N., R. 64 W., Crook County, Wyo., southeastward across the Bear Lodge Mountains to a point in...