Fossil Friday!

This week on Fossil Friday, I share another mystery fossil about which I’ll tell you very little. Hailing from the Miocene, this specimen was found in Nevada. It looks like a blob of some sort. Was it a single living blob or many smaller blobs, blobbed together? A piece of dino-poo? A very warty sloth foot? A deformed blowfish? Some of you will know right away. Can you identify what it was?