CGRG Bibliography of Canadian Geomorphology
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Author : Gilbert, R.; and Glew, J.
Date : 1985
Title : A portable percussion coring device for lacustrine and marine sediments
Publication : Journal of Sedimentary Petrology
Issue : 55(4):
Page(s) : 607-608
Abstract
Conventional gravity and piston corers require driving weights of up to several hundred kilograms, and they cannot be used from small boats or in remote locations. Many modifications have been made to the basic design to surmount this problem. These include corers which are anchored on the bottom and forced into the sediment by ropes and pulleys (Issacs and Brown 1968) or compressed air (Mackereth 1958), corers operated by rods from the water surface (Livingstone 1955), and corers which release their weights and float to the surface (Moore 1961). Some of these are restricted to use in moderately shallow water. The complexity of other devices limits their use from small boats. The technique of hammering a corer into sediment has been used by diver (Martin and Miller 1982) and a remotely operated percussion corer requiring two ropes is described by Digerfeldt (1978). The percussion corer described here requires a single rope and can be usedfrom a very small boat in water depths exceeding 100 m to obtain cores 7.0 cm in diameter and more than 1.5 m in length. The corer weighs 20 kg and is easily dismantled for backpacking or transportation in small aircraft to remote locations.
Bibliography of Canadian Geomorphology