Geophysical Measurements of the Depth of Weathered Mantle Rock

Dart Wantland

doi:10.1520/STP44012S

SYMPOSIA PAPER Published: 01 January 1952

STP44012S

Geophysical Measurements of the Depth of Weathered Mantle Rock

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Geophysical field studies are described which were made to ascertain the depth of weathered overburden mantle rock at the proposed site of a dam, on the American River in California. The applications of the electrical resistivity, the seismic refraction, and the magnetic methods in attacking this problem are discussed. The interpretation procedures employed are explained. Examples of results are presented which show that the geophysical and core drill determination of the depth to sound rock agreed within less than 4 ft. It is brought out that geophysics is a useful exploration tool at sites where the amount of rock that would have to be stripped is a factor.

Author Information

Wantland, Dart

U. S. Bureau of Reclamation, Deniver, Colo.

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Details

Developed by Committee: D18

Pages: 115–135

DOI: 10.1520/STP44012S

ISBN-EB: 978-0-8031-5919-8

ISBN-13: 978-0-8031-6073-6

Geophysical Measurements of the Depth of Weathered Mantle Rock

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