Mazon Creek Fossils and Deposits Illinois State Museum: Plants of Mazon Creek Plants of Mazon Creek Mazon Creek Fossils MAZON CREEK Mazon Creek Plant Fossils Illinois State Museum: Plants of Mazon Creek Illinois Mazon Creek Plant Fossils, Illinois, USA Mazon Creek ferns fossil plants fossil plants About the Mazon Creek Fossils and Deposits Mazon Creek Fossil Flora Mazon Creek Plant Fossils, Illinois, USA Illinois About the Mazon Creek Fossils and Deposit July 2, 1996 Mazon Creek online exhibit