All Fossils

Ammonite (Douvilleiceras) (Lower Cretaceous (Albian stage))

Polished Sliced Ammonite (Cretaceous (likely Albian stage))

Coprolite (Fossilized Dung) (Likely Cretaceous or Jurassic, though coprolites occur throughout the Phanerozoic)

Coprolite (Fossilized Dung) (Triassic to Jurassic (likely Mesozoic))

Grallator Track (Theropod Footprint) (Late Triassic to Early Jurassic)

Coprolite (Fossilized Dung) (Likely Cretaceous or Jurassic)

Agatized or Petrified Wood Fragment in Matrix (Likely Triassic to Lower Cretaceous)

Fossiliferous conglomerate with indeterminate faunal remains (Likely Carboniferous to Permian)

Carbonized Plant Compression (Seed Fern/Glossopteris) (Permian to Triassic)

Calamites Stem Fragment (Horsetail Fossil) (Carboniferous (specifically Pennsylvanian sub-period))

Calamites (Horsetail) Stem Fragment (Carboniferous (Pennsylvanian sub-period))

Ediacaran Frond-like Organism (Fragment) (Ediacaran Period (Neoproterozoic Era))

Petrified Wood (Tree Branch or Wood Fragment) (Likely Triassic to Cretaceous (Mesozoic Era))

Stromatolite (Cyanobacterial Mat) (Precambrian (likely Proterozoic eon))

Pennsylvanian Plant Impressions (Carboniferous (Pennsylvanian sub-period))

Calamites Stem Impression (Carboniferous (Pennsylvanian sub-period))

Grallator (Theropod Footprint) (Lower Jurassic)

Felted Plant Matter / Woody Carbonaceous Compression (Carboniferous (Pennsylvanian sub-period))

Hadrosaurid Dinosaur Bone Fragment (Upper Cretaceous)

Coprolite (Fossilized Dung) (Likely Cretaceous or Paleogene based on morphology and mineralization)

Paleozoic Seed Fern Leaf Impression (Carboniferous (Pennsylvanian sub-period))

Calamites Stem Impression (Carboniferous (Pennsylvanian sub-period))

Mazon Creek Coprolite (Carboniferous (Pennsylvanian subperiod))

Dinosaur Coprolite (Petrified Dung) (Jurassic to Cretaceous)

Petrified Wood / Fossilized Conifer Bark (Triassic (Late Triassic))

Petrified Wood / Fossil Wood Fragment (Likely Triassic to Jurassic)

Ediacaran Dickinsonia-like Impression (Ediacaran Period (late Neoproterozoic Erathem))

Tully Monster / Soft-bodied Bilatarian (Carboniferous (Pennsylvanian subperiod))

Cycad Leaf Fragment (Palaeozamia or Zamites) (Jurassic to Early Cretaceous)

Glossopteris Leaf Impression (Permian)

Glossopteris leaf (Fossilized Seed Fern Leaf) (Permian)

Tetrapod Footprint or Trackway (Triassic (Early to Middle Triassic))

Stromatolite (Cyanobacterial Mat) (Precambrian (likely Proterozoic eon))

Calamites Stem Impression (Horsetail relative) (Carboniferous Period (likely Pennsylvanian subperiod))

Ediacaran biota (Descriptive: Discoidal or multi-lobed impression) (Ediacaran Period (late Neoproterozoic))

Mazon Creek Plant Fossil (Neuropteris leaf segment/branch fragment) (Carboniferous (Pennsylvanian subperiod))

Iron-rich Siderite Spherule or Concretionary Mass (Likely Carboniferous (Pennsylvanian) to Cretaceous)

Invertebrate Trace Fossil in Ironstone (Likely Paleozoic to Mesozoic era, possibly Pennsylvanian or Cretaceous depending...

Fossil Leaf Impression / Gymnosperm Leaf (Triassic to Early Jurassic)

Trilobite (Partial Impression) (Lower to Middle Cambrian)

Carboniferous Seed Fern Frond (Carboniferous (Pennsylvanian subperiod))

Fragmentary dinosaur bone (possible Spinosaurid or Carcharodontosaurid fragment) (Cretaceous (Cenomanian stage))