I'm not a geologist but I am interested in the science and have done a bit of reading on it. His books, particularly Assembling California, have always intrigue

I'm not a geologist but I am interested in the science and have done a bit of reading on it. His books, particularly Assembling California, have always intrigued me. I've always wondered how professional geologists look at them. Given that he spent a lot of time in the company of some highly respected scientists, I imagine he got most of what he wrote right.