3 3/4" Angustidens Shark Tooth

I still can't believe I found a tooth of this quality. Large angustidens teeth are seldom found intact. I don't know why, but I think it has something to do with the geology. First, the tooth has to fall out of the shark's mouth without feeding damage. In case you hadn't noticed, sharks aren't generally too careful with their teeth. Lets say the tooth made it to the ocean bottom intact. Then, it lies there for 28 - 30 million years (in this tooth's case, anyway) while the ocean receeds and floods again. During the times the tooth is above water, it has to survive destruction from the elements, large mammals, etc. Then, under water, it gets tossed around in the surf. Its amazing any teeth survived at all. A choice few remain in their original layer. This one did for sure. Finally, it was eroded by the river and deposited in the rock bed for me to find. Judging on the level of crust it had on it, it had been there for years. And still, its intact. It'll be a while before I can put this one in the case!