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Showing results for tags 'greenbrier formation'.
This one comes from a friend. He found this on a piece of sandstone that had fallen from an outcrop. With his GPS coordinates, it’s close to the border of the Greenbriar and the Mauch Chunk Formation. It looks like a modern mammal track to me, with 4 toe pads and a central pad. But I’ve identified 0 fossil animal tracks so far, so it might just be a strange arrangement of shapes. Mammals doesn’t fit, as it’s 100 million years too early. Synapsids are officially 10 million years out. So I’m at a loss. Anyone good with tracks?