Mammoth Rubbing Rocks
Elevation 113 ft.
In 2001 E. Breck Parkman, Senior State Archaeologist for California State Parks, discovered blueschist sea stacks and boulders he believes were used for grooming by extinct ice age megafauna such as the Columbia Mammoth. See Mammoth Rocks for more details.
Looking toward the rubbing rocks with Duncan’s Point and Bodega Head in the distance. During the last ice age and the first few thousand post-glacial years sea levels were far lower than today. The continental shelf was exposed as a broad, flat, coastal plain and may have been a megafauna migration route.
The polished surfaces reach pretty high, and then stop.
The polished part of the rock is just a veneer.
Photographs by Bob Bardell