Plate Boundary

March 05, 2006


Provided by: Chris Visco, Sachem High School
Summary authors & editors: Chris Visco

This sign marks the boundary between two tectonic plates, and sits on the San Andreas Fault. The Earthquake Trail at Point Reyes National Seashore takes hikers on a journey through the San Andreas Fault Zone. Rather than an actual line, the fault comprises a fairly wide area where the North American Plate meets the Pacific Plate. The fault is actually a transform fault, a plate boundary where two plates are sliding against each other. The last time the fault slipped in this area was 100 years ago -- during the famous 1906 San Francisco earthquake. Scars from this powerful quake are still visible along the Earthquake Trial.

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