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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

Volume: 38 (1954)

Issue: 1. (January)

First Page: 129

Last Page: 147

Title: Underwater Mapping by Diving Geologists

Author(s): H. W. Menard (2), R. F. Dill (2), E. L. Hamilton (2), D. G. Moore (3), Geo. Shumway (2), M. Silverman (2), H. B. Stewart (3)

Abstract:

Self-contained diving equipment makes it possible for properly trained geologists to map the continental shelf to a depth of 120 feet. The equipment opens about 1,000 square miles of the sea floor off southern California to inspection by geologists. Much of the area may contain enough outcrops to be mappable.

This new technique was used to map about 2 square miles of the continental shelf on the north side of San Nicolas Island, California. Two mapping teams each consisting of two divers and a recorder-navigator operated in small boats based on a ship. Two days were spent diving during a 4-day period. Outcrops were found at 26 of 28 stations and dips and strikes were measured at 25 stations. All stations were occupied by pairs of divers in accordance with standard safety procedure.

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