best method for dating rocks

The study of paleogeography has two principle goals. The first goal is to map the past positions of the continents. The second goal is to illustrate the changing distribution of mountains, lowlands, shallow seas, and deep ocean basins through time. The past positions of the continents can be determined using top dating apps ios following five lines of evidence: paleomagnetism, linear magnetic anomalies, paleobiogeography, paleoclimatology, and geologic history.

best method for dating rocks

best method for dating rocks

By measuring the remanent magnetic field often preserved in iron-bearing rock formations, paleomagnetic analysis can determine whether a rock was magnetized near the Pole or near the Equator. The Earth’s magnetic field has another important property. Like the Sun’s magnetic field, the Earth’s magnetic field “flips” or reverses polarity. Fluctuations, or “anomalies”, in the intensity of the magnetic field, occur at the boundaries between normally magnetized sea floor, and top dating apps ios floor magnetized in the “reverse” direction.

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