Source: wikibot/natural-remanent-magnetization
= Natural remanent magnetization
{wiki=Natural_remanent_magnetization}
Natural remanent magnetization (NRM) refers to the magnetization that a rock or sediment retains over time due to the presence of magnetic minerals within it. This remanent magnetization arises during various geological processes and is indicative of the Earth's historical magnetic field at the time the rock or sediment was formed or altered.