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Geologic map of the Colombo Quadrangle of the Moon
D. P. Elston
1972, IMAP 714
Relative ages of structures and geologic units have been determined from intersection and apparent overlap relations and from morphologic freshness reflecting degree of preservation. The fivefold crater-age sequence is based on the classification of Shoemaker and Hackman (1962<span...
Water resources of Clay, Greene, Craighead, and Poinsett Counties, Arkansas
Marion S. Hines, Raymond O. Plebuch, A. G. Lamonds
1972, Hydrologic Atlas 377
Water is available in Clay, Greene, Craighead, and Poinsett Counties from ground-water and surface-water sources. However, ground water is more accessible in many places than surface water. Ground water is available from the alluvium, which covers all the area except Crowleys Ridge, and is also available from other formations below...
Geological Survey research 1972, Chapter C
Water Resources Division, U.S. Geological Survey
1972, Professional Paper 800-C
This collection of 37 short papers is the second published chapter of "Geological Survey Research 1972." The papers report on scientific and economic results of current work by members of the Conservation, Geologic, and Water Resources Divisions of the U.S. Geological Survey.Chapter A, to be published later in the year,...