A Geological Reconnaissance in Southwestern Nevada and Eastern California

Basic Information
Author: Ball, S.H.
Description: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.
Publication Date:
Author Contact Information
Distributor Contact Information
Organization Name: Nevada Bureau of Mines and Geology
Street: UNR MS 178
City: Reno
State: NV
Zip: 89557
Phone: 775-784-6691
Geographic Extent
North Bounding Latitude: 38.688
South Bounding Latitude: 34.8525
East Bounding Longitude: -114.675
West Bounding Longitude: -119.553