A Geological Reconnaissance in Southwestern Nevada and Eastern California

Introduction - The field work on which this USGS Bulletin No. 308 is based covered a period lasting from June to December, inclusive, 1905. The geologic work was under the general supervision of Mr. F. L. Ransome, and was carried on simultaneously with the mapping of the topographic base by Messrs. R. H. Chapman and B. D. Stewart.The writer is fully conscious of the many inaccuracies of the geologic map herewith presented, but trusts that it may prove not only an aid to the prospector and miner, but a contribution to the geology of an intensely interesting region. Each day approximately 45 square miles was mapped in an area of by no means simple geology, and in many localities the geologic mapping of necessity preceded the topographic. No other region in the United States is so favorable to-rapid mapping, since the exposures are unexcelled and the scant vegetation masks scarcely a geologic detail. The geology of the Paleozoic rocks is, however, difficult, partly on account of the lithologic similarity of many of the formations, but largely because these older rocks are in part hidden by mantles of Tertiary lavas and Recent gravels. In the text it has been the endeavor to distinguish clearly between observations made at close range and inferences drawn with the aid of the field glass. The mapping of the outer Goldfield hills and of the Pahute Mesa are particularly unsatisfactory.

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Additional Info

Field Value
Citation Date 1907-01-01T12:00:00

Harvest Information

Original ID 50ec3aefb656b70647f32e38bccc5868
Index Date 2015-07-01T21:47:42Z
Original Format ISO-USGIN
Original Version 1.2

Author

Name Ball, S.H.
Position missing
Organization USGS
Email Missing

Geographic Extent

North Bound 38.688
South Bound 34.8525
East Bound -114.675
West Bound -119.553