EntityQ2564342· pop 9· linked from 240 articlesMazon CreekSign in to saveplace in Illinois on the National Register of Historic PlacesConnectionsfresh waterEntityarrow wormsEntityconcretionEntityCalamitesEntityTullimonstrumEntityChicagoEntityoceanEntityyearEntityinsectEntitygeographic coordinate systemEntitysharkEntityInternational Standard Book NumberEntityequatorEntitycarbon dioxideEntitySpringfieldEntitylatitudeEntityCrocodileEntitypaleontologyEntitytissueEntityfossilEntityCategories1997 in paleontologyCarboniferous IllinoisCarboniferous paleontological sitesGeography of Grundy County, IllinoisLagerstättenNational Historic Landmarks in IllinoisNational Register of Historic Places in Grundy County, IllinoisNatural features on the National Register of Historic PlacesNatural history of IllinoisPaleontology in IllinoisPaleozoic paleontological sites of North America