We took a brief side trip of about 1 hour to drive a scenic unpaved road through Rainbow National Park just outside Barstow, Ca.
The park looks to be serpentine soil (because of the green color), and although California has plants adapted to serpentine soils, they are probably not adapted to the heat of the Mojave as well.
The graded but unpaved road narrows to one lane in many places, but we managed it in a 2wd Toyota Rav4
Very little grows there.
There's lots of interesting strata exposed by the elements.
This last one is on the road into the monument
- Posted at great expense from my iPhone