I_gotta_rock Posted January 12, 2016 Share Posted January 12, 2016 Found two fossils with any distinctive shape this weekend at Swatara State Park in PA. The ridged one I'm thinking is a jumbo crinoid of some sort, but I've never seen one bigger around than a pencil before. It looks like it had concentric rings and the one end seems to show the outline of where the critter stopped and the clay hardened around it. Thoughts? Also, I spilt this one open and almost missed it because I was looking for something 3D, but it is too regular a pattern to be a random pattern in the mud. Thanks to anyone who has ideas! I refuse to give up my childish wonder at the world. Link to comment Share on other sites More sharing options...
Rockwood Posted January 13, 2016 Share Posted January 13, 2016 The photo in the upper right looks more suggestive of trilobite to me. The size is not out of reach for a crinoid, but the composition seems wrong. The last piece brings to mind layers in similar formations here in Maine that contain the occasional recognizable shell in what has otherwise deteriorated to shapes in concretion. Link to comment Share on other sites More sharing options...
TqB Posted January 13, 2016 Share Posted January 13, 2016 (edited) The first one looks like a ribbed nautiloid cephalopod of some sort. The second could be a feeding trace, intriguing shape. Edited January 13, 2016 by TqB Tarquin Link to comment Share on other sites More sharing options...
Guguita2104 Posted January 18, 2016 Share Posted January 18, 2016 I'm with Tarquin in cephalopod. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now