Abstract

The unconsolidated condition of deep ocean-bottom sediments and their remoteness from the operator place definite limitations upon the design of apparatus and the technique of obtaining core samples of them. The varved clays of glacial lake bottoms, while not identical with deep-ocean sediments, are sufficiently similar to warrant some comparisons and provide a means of estimating the factors affecting the validity of a core taken from the ocean bottom. Tests indicate that cores are not so long as the instrument penetration but that they contain material from depths greater than the core length. Relationships have been established that indicate the corrections that must be applied to an ocean-bottom core and require only the measurement of the core itself.

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