Fossil

Tumbled septarian nodule fragment (probable)

Septarian calcite–aragonite concretion with brown clay/mudstone matrix

Fossilized Bone Chunk

Permineralized Vertebrate Bone (indeterminant)

Tumbled, weathered limestone or calcareous concretion

Calcite-rich limestone; predominantly calcium carbonate (CaCO₃)

Crinoid Stem Fossil in Matrix

Crinoid (Class Crinoidea) in Limestone/Siltstone matrix

Brachiopod Fossil in Limestone

Phylum Brachiopoda embedded in sedimentary rock

Fossilized Horse Tooth

Equus sp. (Tooth)

Fossilized Bone

Permineralized Vertebrate Bone

Fossilized Tooth

Vertebrate Fossilized Tooth (Mineralized Biogenic Material)

Fossiliferous limestone

Bioclastic limestone, chiefly calcite (CaCO₃)

Polished fossiliferous limestone

Fossiliferous micrite/bioclastic limestone, likely crinoidal or shell-rich limestone

Fossil plant impression slab

Fossilized plant compression/impression; exact taxon indeterminate from the image

Fossiliferous limestone

Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)

Fossil coral in limestone

Fossilized colonial coral, likely tabulate or favositid coral (CaCO₃), preserved in calcitic limestone

Fossilized oyster shell

Ostrea/Exogyra sp.; calcium carbonate (mostly calcite)

Fossiliferous pebble, possibly a crinoid or shell fragment

Indeterminate bioclast in a dark sedimentary matrix; likely carbonate fossil material (calcite, CaCO₃)

Fossiliferous shale or mudstone with a brachiopod fossil

Likely a spiriferid brachiopod fossil in dark shale/mudstone; exact species and age require locality and examination

Belemnite Fossil (Guardsman Fossil)

Belemnitella spp. (Rostrum)

Crinoid Fossil Fragment

Crinoid stem fossil (Echinodermata)

Brachiopod Fossil

Phylum Brachiopoda (order potentially Spiriferida)

Bivalve Fossil (Internal Mold)

Bivalvia (Phalladomya or similar genus)

Mosasaur Tooth

Mosasaurus beaugei (Fossilized Tooth)

Mosasaur Tooth Fossil

Mosasauridae (likely Prognathodon or Plioplatecarpus)

Sandstone with Fossil Leaf Impression

Sedimentary rock (Sandstone/Siltstone matrix) with Carbonaceous film fossil

Fish Fossil in Limestone

Lycoptera (likely) in Micritic Limestone

Fossilized Bivalve Shell

Bivalvia (Phylum Mollusca)

Fossilized Shark Tooth

Chondrichthyes tooth

Mammoth or Mastodon Tooth Fragment

Mammuthus / Mammut molar fragment

Fossil Brachiopod or Mollusk Cast

Phylum Brachiopoda / Mollusca internal mold

Fossil Shark Tooth

Chondrichthyes (Class)

Fossil Snail

Gastropoda (fossilized)

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Tumbled fossiliferous limestone

Bioclastic limestone, primarily calcite (CaCO₃)

Chert or flint with chalcedony/quartz veins

Microcrystalline silica: primarily quartz (SiO₂), including chalcedony; possible fossiliferous limestone or silicified material

Fossiliferous limestone

Bioclastic limestone, primarily calcite (CaCO₃)

Fossiliferous Rock (Invertebrate Fossil in Matrix)

Fossiliferous limestone or shaly matrix containing skeletal fossil remains

Fossil Bone Fragment

Petrified bone (permineralized hydroxyapatite)

Fossilized Trilobite Pygidium / Glabella Fragment

Trilobita (e.g., Phacops or Ceraurus sp.)

Fossilized Bivalve in Limestone

Class Bivalvia within Sedimentary Matrix (likely CaCO3)

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea

Tumbled fossil coral or carbonate fossil fragment

Likely fossilized coral, composed mainly of calcite (CaCO₃); exact identification is uncertain from the image

Tumbled fossiliferous limestone

Calcite-rich limestone (CaCO₃), possibly fossiliferous micrite

Turritella Agate (Elimia Agate)

Silicified Elimia tenera (formerly misidentified as Turritella)