Some odd wood imprints from Lasalle County Il.

[Thomas J. Corcoran]

I need help identifying these, they are everywhere here in Marseilles but I don’t know what they are

[Thomas J. Corcoran]

More pics because of the size limit

[Thomas J. Corcoran]

[deutscheben]

The bedrock would be Pennsylvanian in that area, so those could be carbonized plant remains, but I don't think there is enough detail preserved to be more specific.