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Based on the theory of plate tectonics, it is inferred that over the past 250 million years North America has moved toward the

In order to date a rock sample 4 billion years old a scientist would most likely use this radioactive isotope

The folding of rock layers to form a mountaiin was most likely caused by

The half life of a radioactive material can

In rock layers which have not been disturbed, which is typically the oldest layer?

The most important tool in your test taking arsenal is your

Which characteristic is most useful in correlating Devonian-age sedimentary bedrock in New York State with Devonian-age sedimentary bedrock in other parts of the world?

In the United States, most of the major damage expected from a future earthquake is predicted to occur near a