Random Fossil Post

I have lots of fossils from my younger collecting days that have no label or sparse information. Some are among my favorites but with little info they get relegated to Random Fossil Posts.

Today we have this Collignoniceras sp. ammonite from the Cretaceous (Cenomarian) of Wyoming. It's a beautiful little ammonite with one of the chamber walls visible near the end of the sprial.

Next are a couple of fossils from the Mazon Creek flora of Illinois. This flora, named after the locality where they were first found, is preserved in ironstone (Siderite) nodules. I have this Macroneuropteris leaf....

and some annularia.