Bowling Ball Beach

Geologic Trips

Concretions

The bowling balls at Bowling Ball Beach are concretions that have eroded from the sandstone beds of the Miocene Galloway

Fm. The sandstone bed exposed in the bluff in the top center of the photograph has several concretions that are in the process of forming new bowling balls. As the cliff is worn back by the waves, the hard sandstone concretions are left behind.

 

Notes

Bowling Ball Beach is in Schooner Gulch State Park, between Gualala and Point Arena.

Go at low tide, the bowling balls and the beach are covered at high tide.

 

Places to See the Rocks

Bowling Ball Beach (pdf)

 

Related Links:

Geologic Background, Sea Ranch

Rocks of the Gualala Basin

 

Book

Geologic Trips, Sea Ranch and Bowling Ball Beach (pdf), by Ted Konigsmark

 

Exterior Websites

California State Parks: Schooner Gulch State Beach

California Coastal Records Project: Aerial Photographs, Schooner Gulch

Point Arena: Bowling Ball Beach, Trail

Wikipedia: Concretions

 

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