Magnetostratigraphy takes advantage of the fact that ____________.
A)Earth's magnetic field only arose 10,000 years ago
B)Earth's magnetic field has been uniformly strong,with constant polarity,throughout Earth's history
C)Earth's magnetic field has experienced numerous polarity reversals,with periods of normal and reversed polarity of varying lengths

Question

Quizplus · Accepted Answer

Magnetostratigraphy takes advantage of the fact that Earth's magnetic field has experienced numerous polarity reversals, with periods of normal and reversed polarity of varying lengths. This allows scientists to use the rock record to date events, since magnetic minerals in rocks align with the direction of Earth's magnetic field at the time the rock was formed. By mapping the pattern of magnetic polarity in rocks, scientists can determine the rock's age relative to other rocks with known ages, and build a timeline of Earth's history.

Magnetostratigraphy Takes Advantage of the Fact That ____________