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Audubon Naturalist Hour: Using Rock Dating to Determine the Age of Great Falls
March 23, 2021 @ 7:00 pm - 8:00 pm
Using Rock Dating to Determine the Age of Great Falls
Tuesday, March 23, 2021 at 7:00 pm
Joe Marx
Adjunct Professor in Geology, Northern Virginia Community College (NVCC)
Geology Professor Joe Marx will explain how geologists determined a precise age for the Great Falls of the Potomac. Until about 20 years ago, the best estimate of the age of Great Falls was between “several thousand to several million years.” Rock dating techniques that became available in the late 1980s now allow us to give a much better answer.