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Third special report of the Hawaiian Volcano Observatory of Hawaii National Park and the Hawaiian Volcano Research Association: Ash formations of the island Hawaii
The purpose of the study was to determine the areal extent of the various volcanic ash formations, to describe them petrographically and to develop means of discriminating them. The ash formations, long known in a general way, had been only casually observed by geologists. Their interpretation and separation from other surficial materials has been much retarded by great differences in the degree o
Authors
Chester K. Wentworth
Ground-water conditions in a portion of the Rio San Jose-Bluewater valley in the vicinity of Grants, New Mexico
No abstract available.
Authors
Arthur M. Morgan
Fifty-ninth annual report of the Director of the Geological Survey
Basically important in the general program of conservation and development were the results of the Geological Survey's work during the fiscal year 1938. Investigations of the Nation's mineral and water supplies were conducted with all possible vigor and dispatch, thousands of square miles were surveyed for topographic maps, and technical supervision was given to prospecting, mining, and producing
Authors
Walter Curran Mendenhall
A new Upper Cretaceous rudistid from the Kemp clay of Texas
No abstract available.
Authors
L. W. Stephenson
Drought of 1936, with discussion on the significance of drought in relation to climate
No abstract available.
Authors
John Clayton Hoyt