All the time I've been up here, I have joked that we have no soil. Our ground consists of granite, decomposed granite and sand. The good part of this ground is that we never have mud. The downside is that it is impossible to dig when dry.
Mike, the handyman, spent the first hour scraping off about 1 inch of the top and making small dikes so we could soak the area. Once this stuff is wet, it digs easily. This photo was taken after the second day's work. There is some more digging to do, so more dikes. And, yes, that corner is higher. That was less decomposed over there and much more composed.