So you think the creek wash, is Devonian even though it crushes easily with a pliers? Also would you recommend it as a parking lot, I mean can I drive on it without crushing it into clay or having it stick to the tires when wet? I think maybe you are talking about shale left in place after removing the subsoil and I'm talking about those little shale bits (rounded and worn) that get washed down the creek that you can shovel like gravel. But yes, I have removed the subsoil to the Devonian layer, and now I am thinking about filling the last four inches with weathered creek wash (bits of shale) as the finished stone surface.
jmf
