Natural Remanent Magnetization

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Natural Remanent Magnetization (Abbreviated NRM) is the permanent magnetism of a rock. The NRM is frozen into the rock. It does not change with other location.

The NRM is stripped away in a stepwise manner using thermal or alternating field demagnetization techniques to reveal the stable magnetic component. The stable component is usually interpreted to be the Detrital Remanent Magnetization.

Natural Remanent Magnetization analysis is the method which measures the intensity and direction of residual magnetism in rocks to determine their age and history.