On Thu, 8 Sep 2016 10:50:52 -0400, dadiOH wrote:

As you said, it is a melange consisting of a considerable variety of rock
types both metamorphic and sedimentary. That variety gives rise to a number
of soil types.

This link to the statigraphy of Mendocino County...
http://www.mendowine.com/files/Tom%2...0co%20geol.pdf
near the bottom shows some. The nearest in appearance to the type you
linked is the Redvine Sandy Clay Loam. Above that - about halfway down - is
a location map.with which you should be able to get close to your location.

Thanks. I have a *lot* of the geology texts for my area, since it's one of
the most studied areas on the planet (lots of earthquakes occur here).

Here's a photo I took today of the classic "ribboning" of the sedimentary
rock layers in cut along my rather steep driveway.
http://i.cubeupload.com/BLWg5f.jpg

You can see that the rocks have been blended by a blender of sorts, which
they term the "nightmare of the Franciscan sediments" in geology books.