Archeomagnetic and paleomagnetic dating

25-Aug-2020 06:45

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In the 19th century studies of the direction of magnetization in rocks showed that some recent lavas were magnetized parallel to the Earth's magnetic field. Blackett provided a major impetus to paleomagnetism by inventing a sensitive astatic magnetometer in 1956.

Certain minerals in rocks lock-in a record of the direction and intensity of the magnetic field when they form.