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California National Natural Landmarks

La Brea Tar Pits (Rancho La Brea)(Los Angeles) - 7/26/1994
An active paleontological research site formed around a group of tar pits where natural asphalt has seeped up from the ground for tens of thousands of years

Mt. Diablo State Park - 5/15/2009
Contains the best examples of diapiric (igneous intrusion) geologic processes in the South Pacific Border biophysiographic province

San Andreas Fault - 11/15/1996
A continental transform fault extending roughly 750 mi, it forms the tectonic boundary between the Pacific Plate and the North American Plate