Last modified on 3 August 2009, at 21:32

Category:Mazon Creek

English: Mazon Creek is a term for fossils in ironstone concretions found near Morris, Illinois, USA. Found in the Francis Creek Formation, the fossils date to the Pennsylvanian in the upper Carboniferous

Media in category "Mazon Creek"

The following 3 files are in this category, out of 3 total.