Excavating for fossils

Hi Folks. I have found over a hundred of these in a relatively small area. Basically, in my yard and garden. I recently tilled a neighboring section up the ridge about 30' X 40' to look for more arrowheads and such. Found 2 arrowheads after the first rain, and maybe 20 of the fossils. There is only a few inches of top soil, then there is soft yellow shale several feet deep in places. I drilled some 40" deep holes for a pole building by the garden and it was all the soft shale. Th

Hi Kane, I looked at several maps, then got confused with all of the formations but determined that it is Devonian in this area. We had a little rain last night and this morning. I went to lay out my "dig" and this fellow caught my eye where I last tilled. All I saw was a smooth arch protruding out of the dirt about the size of a pea. I was surprised after cleaning it up as it looks like a claw. Perfectly symmetrical and slick as a whistle. It has a cavity in the center just lik