chemical remanent magnetization
Also found in: Acronyms.
chemical remanent magnetization[′kem·i·kəl ′rem·ə·nənt ‚mag·nət·ə′zā·shən]
Permanent magnetization of rocks acquired when a magnetic material, such as hematite, is grown at low temperature through the oxidation of some other iron mineral, such as magnetite or goethite; the growing mineral becomes magnetized in the direction of any field which is present. Abbreviated CRM.