Lake Del Valle, Campsite 7414 cupule rock and 1 small bedrock mortar on rock in the nearby creekElevation 714 ft.Thanks to Joel and Alex for discovering these rocks.The cupule rock was likely moved here. The patterns of cupules appear non-random, which suggests they may have had representational functions.This shallow mortar is difficult to make out […]
Stromer Spring25 bedrock mortars, cupules, and PCN-style petroglyphsElevation 2023 ft.We used to drink from Stromer Spring in the not-so-distant past. The Park District warns against doing it now.A nice, single-track trail passes near here. We followed it many times without ever stopping to examine these rocks. If we considered them at all, we dismissed them […]
West Ohlone Rocky Ridge17 bedrock mortars and 20 cupulesElevation 1958 ft.Thank you Jeff! Another great discovery. We passed within 50 yards of this site at least three times without noticing it.Bob heads toward the site. There are mortars in that pile of rocks straight ahead of him down the hill.A fine example of a rock […]
Williams Gulch2 bedrock mortars and 2 cupulesElevation 1369 ft.Jeff has a way of finding bedrock mortar rocks in remote locations.The mortar rock here sits on a little shelf above Miller’s Creek.Another view of the mortar rock.A closeup of the rockPrevious two photographs by Jeff Green.This site is on private property. Secure permission before visiting it.