New Book by Ray Mills

[NuggetBob]

Well boy howdy Ray! I think you're the feller I met about 7 years back up near Shasta. I was driving my old Jeep and had my old dog with me and a flat. You helped me change her out and we swapped gold bug stories. That's my reckoning 

[beatup]

Your book is a great read Ray.

[rumblefish]

Hmm, I always thought rocks like that were granite, which I have heard are good for gold too.

 

Diorite and Granite are both intrusive igneous rocks, which means that they were formed when magma flows into spaces under the earth's surface and cools. Their mineral composition varies somewhat - the type of feldspar they contain is different for example. But they are both formed from the flow and cooling of molten rock, a geologcial event which could also bring gold up into the region. You won't find these very old rocks (or the gold around them) unless they have been exposed by erosion or a major earth movement. So if you see them, it could be a good indicator of exposed gold in the area.