lab geofiz 2 

The objective of the paleomagnetic testing is to determine directions of the ancient geomagnetic fields recorded in rocks and to track their changes with time. Present-day magnetization of rocks results from combination of magnetic vectors of different ages that can be identified by demagnetization, using the variable magnetic field or altering the temperature. Valuable information can be provided not only by primary but also secondary components of magnetization. Paleomagnetism is one of the geophysical specialties that are very closely related to geology, and its numerous applications are used in stratigraphy, tectonics, and paleoenvironmental studies (especially magnetic susceptibility studies).