Hey guys, I managed to get a small diamond drill for really cheap and I want to use it for placer gold testing. What I want to do is take core samples of alluvial material (gravel, glacial till, soil, overburden) and to sample the bedrock for a foot or two.
The drill that I have is called a...
My uncle found this conically shaped obsidian core while gardening in his backyard in Rancho Palos Verdes California. (L.A. county) near the coast. He had no idea what it was. the area where he unearthed it was at the bottom of a steep slope. He said that he has found other flakes of obsidian in...