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natural remanent magnetism


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(NRM)

The remanent magnetization of rocks and naturally occurring objects that has been acquired by normal processes, i.e. excluding laboratory-induced magnetizations. In igneous rocks and fired archaeological materials, NRM is normally of thermal or chemical origin; in sediments it is usually of depositional origin; and in sedimentary rocks it is usually of chemical origin.

Subjects: Earth Sciences and Geography — Ecology and Conservation.


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