Long Canyon and Marsh Creek36 bedrock mortars, 29 on one rock.The location of this site near the mouth of Hog Canyon meant that this was a “gatehouse” settlement guarding one of the principal routes into the Volvon heartland. This was one of the bedrock mortar sites known to early 20th century Contra Costa County historians.This […]
Mira Vista Park10 bedrock mortars and 60+ cupules on a chlorite blueschist boulder near Baxter Creek.Elevation 116 ft.See Canyon Trail Petroglyphs for more details about cupule petroglyphs. Also see Cupule Petroglyphs in the Diablo Range by E. Breck Parkman in the Journal of California and Great Basin Anthropology Vol. 8, No. 2, pp. 254-55 (1986). […]
Rockville Trails Village34 bedrock mortarsElevation 534 ft.The Solano Land Trust saved the Rockville Trails property, which includes this village, from being transformed into a massive housing development. Thank you.There are miles and miles of stacked rock walls in and around Rockville. One of these walls snakes over the hills in the center of this photograph.Heading […]
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 […]