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Over 60% of the Earth's surface is covered with deep marine
sediments, however, until the early 1980s, no comprehensive text
books appeared to support the rapid expansion in the study of these
sediments. While the whole field of marine geology has expanded
enormously and entirely new disciplines, such as paleoceanography,
have been developed, there remains a lack of reference texts on
study techniques that investigators in the marine community can
turn to. Minerals and Mineraloids in Marine Sediments is an optical
identifica tion guide that I believe will become a standard
reference text for use in the microscope analysis of marine
sediment& and sedimentary rocks. The systematic collection of
sediment cores from the deep ocean floor began in earnest with the
Swedish Deep Sea Expedition, 1947-1948. Much of the microscopic
examination of the sediments collected in these piston cores (10 m+
long) was conducted on separated grain mounts or thin sections of
impregnated sediments. By the late 1960s a simpler technique of
examining a mounted smear of the cored silt and clay size sediment
on a microscope slide had become standard practice in American
oceanographic institutions. This semi quantitative technique became
the standard tool used in core description aboard Glomar Challenger
through the 15 years of the Deep Sea Drilling Project (DSDP),
1968-1983. Visual percentage estimates of biogenic and mineral
components were made using petrologic micro scopes."
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