The Carquin, an Ohlone tribelet, held territory on both sides of the Carquinez Strait.
Blue Rock Springs Park — North Rock wall Elevation 695 ft. This wall reminds us of similar alignments on Mission Peak and in the South Bay. It runs, with breaks, nearly all the way to I-80. The barbed wire fence and rock wall coincide with each other. Were they constructed at the same time? Compare […]
Blue Rock Springs Park — South Curved Rock Alignment Elevation 520 ft. This alignment extends along the north and east sides of a little knoll at the bottom of valley. Who constructed it and why? A closer look. The knoll is flat on top. A detail shot showing the stacking.
