This picture is of a microfossil called a scolecondont (part of a worm jaw). It was found in the Waldron Shale of Clark County, Indiana, U...

Here are some images of the Harpacodus dentatus? petalodont fossil tooth. It was found in the Big Clifty Formation of the Indiana Springs...

This is an interesting color for a fossil... ruby red. The following are images of the  Thrinacodus sp  shark fossil tooth. Thrinacodus ...