Cretaceous Turritella Fossil

Gastropod fossil called Turritella sp. from the Cretaceous Period (about 70 million years ago). It was found near Tupelo, Mississippi.

Glabrocingulum ellenae Snail Fossils

These Glabrocingulum ellenae gastropod fossils were found in the Coral Ridge Member of the New Providence Formation of Clark County, Indiana.  The three fossils are shown in this post and all are pyritized.  These snails crawled along the seabed during the Mississippian Period.

Thanks to Kenny for the image.

Pyrite Cephalopod Fossil

This small pyrite fossil is some sort of straight shelled cephalopod. It was found in the Coral Ridge Member of the New Providence Formation which dates to the Middle Mississippian Period (Osagean). The fossil was found in Clark County, Indiana.
The second picture shows a cross section of one of the creatures chambers in an oval spot shows where the siphuncle was. The fossil is about 4 cm long and 1 cm wide. Thanks to Kenny for the pictures.