Grinding Rock Sites – Ohlone Indian Artifacts

The main Indian artifacts found on our ranch are grinding rocks where the Ohlone Indians ground acorns and other edible seeds into meal or flour.

The sites we’ve found are always near or on the top edge of a ridge with a view. The sites always have large rock outcroppings with flat areas large enough for several people to sit together and there is always shade.

Whenever we go to one of these sites it’s easy to see why they were selected. The view raises one’s spirit and the shade protects the grinder from the hot sun.

There is usually a spring near by. Sometimes these sites are quite large and it appears that the Ohlones may have had an entire camp in the immediate area.

The largest site I’ve seen was overlooking La Costa Creek on the south side of Rowell Ridge. The rock outcrop there is so large that the drop off from the edge of the ledge is straight down for over 100 feet.

This past weekend we found a site that I had not seen before. It has at least five ginding holes. The site is on the north side of Rowell Ridge and has a commanding view of the Livermore Valley, Mount Diablo, Brushy Peak and the Black Hills.

My brother Rob and son-in-law, Brett, joined me for a turkey hunt. Afterwards we scouted for artifacts. This is a perfect site.

My brother Rob and son-in-law, Brett, joined me for a turkey hunt. Afterwards we scouted for artifacts. This is a perfect site. Mount Diablo can be seen just behind Rob and Brushy Peak is behind Brett who is standing in the shade.There is a grinding hole at Rob’s feet where my Swiss Army knife is laying on the rock.

We found five wholes. Here they are.

DSC_0087 grinding hole

DSC_0090 grinding holeDSC_0094 grinding hole

DSC_0095 grinding holeDSC_0096 grinding hole

I guess you could say, “When you’ve seen one you’ve seen them all.” Keep in mind that there are other critters that seek out the same sites.

Western fence lizards are common in the rock outcrops.

Western fence lizards are common in the rock outcrops.

Blacktail deer often bed down near ridge tops for safety and hide in the shade. This one popped up about 15 yards from me as I searched for grinding rocks.

Black-tail deer often bed down near ridge tops for safety and hide in the shade. This one popped up about 15 yards from me as I searched for grinding rocks.

Ground squirrels commonly live in these rock outcroppings.

Ground squirrels commonly live in these rock outcroppings.

We often find rattlesnakes in the same places are grinding rocks.

We often find rattlesnakes in the same places are grinding rocks. This was one we saw in the same rock outcrop as the grinding holes.

One thought on “Grinding Rock Sites – Ohlone Indian Artifacts

  1. Have you ever explored the world war 2 airplane wreck on Wauhab Ridge? It looks like a long ridge but it sounds like your on the north side of that ridge somewhere?
    My Uncle was into airplane wreck finding in the Sierra and Owens Valley area. He has passed on but left some books to me. Came upon the Wauhab Ridge wreck.

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