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Bathymetric maps of the Gulf of California Bathymetric maps of the Gulf of California
No abstract available.
Bedrock topography of southwest Iowa Bedrock topography of southwest Iowa
The bedrock in Iowa (Hershey, 1969) is generally overlain by unconsolidataed deposits consisting of glacial drift, alluvium, and loess. Loess deposits are most extensive in areas bordering the Missouri River flood plain, attaining a thickness of over 200ft in some places. The total thickness of the unconsolidated sediments ranges from less than 1 ft to more than 450 ft. The configuration...
Coal-quality information from the eastern United States Coal-quality information from the eastern United States
The United States is attempting to increase domestic coal production in order to reduce dependence upon costly imported petroleum and to stabilize domestic fuel supplies, until alternative sources of energy are developed. In 1975, coal production for the United States amounted to roughly 654 million short tons (593.5 million metric tons) (U.S. Bureau of Mines, 1977, p. 388 and p. 458). A