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Edgar Herbert Bailey

Publications and source records attributed to Edgar Herbert Bailey.

8 recordsLinked to original sources
USGS1981

Mineral deposits and geology of northern Oman as of 1974

An investigation of the mineral resources of northern Oman was carried out under an agreement between the U. S. Geological Survey and the Ministry of Development, Sultanate of Oman, during late 1973 and early 1974. The purpose of the investigation was to provide an evaluation of the mineral potential of northern Oman and produce recommendations leading toward the utilization of any viable mineral deposits that were found. The widespread copper deposits located within the Semail volcanics appear to be mineable, the iron-nickel laterites developed upon the weathered surface of the Semail ophiolite have economic potential. Manganese and chromite deposits investigated have only a marginal value and are not likely to be of economic importance in the near future. Discovery of economic copper and iron deposits warrants further geologic mapping and mineral exploration in northern Oman. In addition to this, recommendations regarding the organization of a geological and mining group within the Directorate of Petroleum and Minerals are presented.

Open-File Report↗
USGS1964

Geology and quicksilver deposits of the New Almaden district, Santa Clara County, California

The New Almaden district, situated a few miles south of San Jose in Santa Clara County, Calif., has yielded nearly 40 percent of the quicksilver produced in the United States. The area mapped as the district for this report includes about 80 square miles, extending south from the flat Santa Clara Valley across the moderately low foothills containing the mines to the more rugged crest of the California Coast Ranges.

California↗
USGS1962

Mercury in the United States, exclusive of Alaska and Hawaii

This map shows the location of mercury districts and deposits in the United States (exclusive of Alaska and Hawaii). The map was compiled from published reports and from data in the files of the Geological Survey. All map locations are numbered consecutively in each state and names, geographic coordinates, and selected references are given in the Index.

Mineral Investigations Resource Map↗
USGS1959

K-feldspar content of Jurassic and Cretaceous graywackes of northern Coast Ranges and Sacramento Valley, California

Graywackes of Late Jurassic to Late Cretaceous age are the predominant rocks in the northern Coast Ranges and the western Sacramento Valley provinces in California. These graywackes are similar in appearance, but their content of K-feldspar, which can be readily estimated after selective staining, differs widely. Study of several hundred specimens indicates that K-feldspar content is helpful in correlating or distinguishing these rocks, and sheds light on the geologic history of western California. In the Sacramento Valley a conformable sequence of Knoxville (Upper Jurassic), Shasta (Lower Cretaceous), and Upper Cretaceous rocks progressively increases in average K-feldspar content with decreasing age. Graywackes of the Franciscan formation, lying in the Coast Ranges farther west, generally contain no K-feldspar, although some contain a trace, and a few of more uncertain affiliation contain large amounts. Another belt of graywackes, west of the Franciscan formation and paralleling the Pacific shore, contains nearly as much K-feldspar as the Upper Cretaceous rocks of the Sacramento Valley, and most of these rocks are probably of middle Cretaceous age. The writers attribute the increase of K-feldspar with decreasing age of the rocks of the Sacramento Valley to changes in the source area, which is believed to be the Klamath Mountains and the Sierra Nevada. The changes include an increase in proportion of granitic rocks to others as the areas were stripped, and more abundant K-feldspar in the younger granitic rocks. The high K-feldspar content in the middle Cretaceous rocks of the coastal belt suggests that the rocks were deposited in the same basin as the Sacramento Valley rocks.

California↗