tom swift among the diamond makers

 Theire is this shale bed called something like buas shale bed and there was a massive finding there a lot of new prehistoric insects where found there in the rock like a lot of them this doctor started doing an investigation but it never got anywhere so they just put them in a drawer for about fifty years until someone else came along pulled them out and looked them over investigating them again and this time they got somewhere but the problem was they couldn't figure out if it was evolution or something else because there were hundreds of them and they were all new types of insects. This shale bed was massive a bunch of railroad workers found.