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Bowling Ball Beach Geologic Trips |
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Concretions |
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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 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 Wikipedia:
Concretions Return to:
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