Elverton exposures

Elverton Drive is a very distinctive place in the high hills, not so much for its houses—though no insult meant to their owners—as for its bedrock. From end to end, it offers the best exposures anywhere of the Claremont chert.

elverton1

If it weren’t for the parking situation, this would be a great spot for a class exercise in field mapping. The strata are clear, the winding road offers a range of orientations to refine measurements, and the rock isn’t totally uncomplicated. Take this spot.

elverton2

What is the nature of the change between neat rows and rumpled layers? What can the student conclude from the evidence, and what should the student look for elsewhere to test those conclusions? I don’t know; I’m just asking and I didn’t inspect this closely. Besides, it might be on someone’s homework.

A few years ago, Elverton was blocked by a landslide. Residents could get in and out from either end, so it wasn’t that bad, but I stayed away until a few weeks ago. I think that this spot must be where it was. (If it’s not obvious, this is sculpted concrete.)

elvertonslide

Near the road’s east end is an old excavation, perhaps a small quarry, where you could examine these rocks at leisure and collect a specimen. But do notice the presence of fallen blocks, and if you feel an earthquake while you’re there, step the hell back.

East of Elverton, the chert crosses the ridgeline into the Huckleberry Preserve and trails into the back hills.

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2 Responses to “Elverton exposures”

  1. oaklandrocks Says:

    I sell real estate and drive up there quite a bit. Yes, the fallen rocks along the road side give me pause. Lack of parking is a problem but facing a car coming in the other direction can also be a major problem. The views are tremendous and most of the homes quite upscale and luxurious.

  2. Michael Kelly Says:

    The local communities love to cover up the good exposures. In Placerville they covered up a great exposure of the new melones fault.

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