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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 16 (1932)

Issue: 12. (December)

First Page: 1230

Last Page: 1234

Title: Seismic Weathered or Aerated Surface Previous HitLayerNext Hit

Author(s): O. C. Lester, Jr. (2)

Abstract:

The existence of a comparatively thin surface Previous HitlayerNext Hit with a low velocity characteristic has been recognized in seismic work for several years, and has been generally referred to as the "weathered Previous HitlayerNext Hit." This low velocity surface characteristic has been found to be almost universally present regardless of the nature of the surface deposits, and does not conform to the geologic weathering of the area.

The purpose of the writer is to offer as an explanation of this phenomenon, the mixture of air in a free state with surface materials. Theoretical calculations, if the earth is assumed to be a fluid, indicate that Previous HitvelocitiesNext Hit less than that of sound in air should be obtained from such mixtures. This is borne out by experimental data, as far as available, indicating that this so-called weathered Previous HitlayerNext Hit might properly be termed an "aerated" Previous HitlayerTop.

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