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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 20 (1950)No. 2. (June), Pages 107-110

A Sonic Device for Underwater Sediment Surveys

E. C. Lafond, Robert S. Dietz, J. A. Knauss

ABSTRACT

A sonic device for roughly determining sea floor composition is described. It consists of a Previous HithydrophoneNext Hit encased in a watertight metal container designed to be dragged along the ocean bottom, and a suitable audio amplifier monitoring equipment located aboard a towing vessel. The frictional noises produced when the metal case is scraped along the bottom are picked up by the Previous HithydrophoneTop and fed through cable to the amplifier. Since the noises caused by mud, sand, stony, and rock bottoms differ in character, it is possible to identify the bottom type by listening to the amplifier output. The device is especially useful for making a very detailed survey of a small area in shoal water for the purpose of constructing a sediment distribution chart.


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