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Showing results for tags 'coal balls'.
Oxytropidoceras posted a topic in Fossil NewsPaleontologic Data Fossilized on IBM 8” Floppies Posted April 13, 2020 by Ben Muddiman, Ivo Duijnstee and Cindy Looy University of Chicago Museum of Paleontology Yours, Paul
Stocksdale posted a topic in General Fossil DiscussionEDIT: These are fusain and not "Coal Balls." They are concretions of fossilized charcoal wood, showing evidence of a forest fire. Note from Jack: (copied from below) These were collected in a Mazon Creek spoil pile from an older underground mine. I understand that the older underground mines would bring up everything from the seam of colchester coal and overlying shale. Then at the surface, they'd remove the "gob" -- non-coal stuff like these and add to the pile.