Here is a picture of an unidentified ammonite fossil. It was found embedded in a step at the Piazza San Marco in Venice, Italy. My guess ...

It is difficult to sometimes identify Devonian Period crinoid stems without their calyx. This specimen was found in Clark County, Indiana,...

Here is an image of a large crinoid calyx (about 10 cm in diameter). It was found in the Devonian Period Jeffersonville (?) Limestone of ...