Swett Ranch16 bedrock mortarsElevation 372 ft.Looking toward the site.At least one mortar rock has tumbled into the nearby creek.A partially buried mortar rock.The same mortar rock after daylighting.More mortar rocks at this site. It’s easy to make out the single mortar rock, but the multi-mortar rock surface is nearly obscured by shrub branches.We were conducted […]
Upper San Leandro Reservoir8 bedrock mortars, 3-5 cupules. Site may be underwater.This is a beautiful spot now because of the Upper San Leandro Reservoir, but it was probably nice in Jalquin times too. Back then these mortars were on a little hillside terrace above Kaiser Creek, a perennial watercourse. How many mortars here and how […]
Windmill Overlook, Lower20 bedrock mortars and several housepits spread along the base of a rock ledge.Elevation 1355 ft.Looking out on the Livermore Valley.Afternoon shadows creep across the land as Bob walks below the rock ledge.A two-mortar rock. Note the elliptical upper section of the funnel mortar.Photograph by Bob Bardell.
Below Cave Point11 bedrock mortars all one one rock.Think those big holes are geoconcretions? Think again. They are huge bowl mortars. Their side walls bulge out into the surrounding rock in a classic “Olla” shape–the bowl is wider at the side walls than it is at the rim. The bottoms of these bowls are basically […]
Canyon Middle School8 bedrock mortars on two rocksElevation 302 ft.Thanks to Joel for discovering this charming site.One of the mortar rocks here sits near the edge of a steep cliff above Crow Canyon Road and the buried Crow Creek.There are beautifully proportioned mortars on this rock.Another beautiful mortar rock sits in a little meadow not […]
Green Valley Creek2 bedrock mortars in Green Valley CreekElevation 380 ft.Thank you Rick Hicks.Bob admires the mortars in the creek behind the Fresh and Easy market on Diablo Road. Although it’s the day after small rain storm, there’s an unaccountable amount of water in Green Valley Creek for late October in a drought year.The closely […]
Los Meganos State Historic Park2 bedrock mortars and two anvilsElevation 230 ft.These mortars sit near Briones Creek in the hills behind John Marsh’s house. We wouldn’t have looked for mortars or even hiked here if Joel had not made an initial reconnaissance of this area.Bob looks toward the mountain and its subsidiary peaks. The Briones […]
Macedo Ranch4 bedrocks in the saddle of the “China Wall”.1 bedrock mortar and a grinding slick on ridge top above.This site is very near the Volvon/Tatcan tribelet boundary.Bob and Jim approach the China Wall.There are some surprisingly deep bedrock mortars here.A closeup of the deepest mortar. We call mortars with interiors like this “bullet-shaped.”