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Showing 1 to 3 of 3 for “"Francis Creek shale"”.
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Ichnotaxonomic assessment of Mazon Creek area trace fossils, Illinois, USA
The Francis Creek Shale Member (FCSM) of the Mid-Pennsylvanian Carbondale Formation along Mazon Creek in northern Illinois is known for soft-bodied organisms preserved within siderite concretions. Trace fossils, though less well known, also occur in concretions. Several hundred trace-fossil-bearing …
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Synthesis of a Middle Pennsylvanian soft-bodied fauna from western Illinois
… examination of thousands of concretions from the Francis Creek Shale (Middle Pennsylvanian) of Fulton County, in western Illinois, has revealed a diverse euryhaline (Essex) assemblage of the Mazon Creek biota. Previous studies suggested the Essex fauna of western Illinois is of low diversity; …