I have come across a very interesting rock on a friends property above the Ojai Valley. Looking for someone who might have some idea what it is. Any help is appreciated.
Thanks for sharing your interesting-looking rock with us. It’s pretty hard to tell from the pictures, but the rock type is probably sandstone. From the angles you show us, it doesn’t appear to have been shaped by human hands, either. It’s actually not unusual to find roundish, naturally-occurring concretions, because as a rock becomes weathered—like the round, smooth stones you find in a riverbed or by the sea—sharp edges are rounded off.
Jonathan Hoffman, Dibblee Collection Manager of Earth Science
John R. Johnson, Curator of Anthropology