Abstract

Recent studies have shown that the isotropic magnetic susceptibility of till is a diagnostic property that can be used to characterize a till unit. The purpose of this study is to examine the techniques that have been used to measure the specific magnetic susceptibility of till and to recommend standard methods of measurement. Studies of specific magnetic susceptibility on till units from Illinois and Ontario show that the susceptibility of various size ranges of till carries information characteristic of the till and that in order to gain the maximum amount of information on a till, the susceptibility of various size fractions should be measured. It is also recommended that low-field measurements should be made so that measurements obtained in one laboratory can be duplicated in other laboratories.

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