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