Fossil

Fossil Shark Tooth

Carcharodon sp. (likely Otodus or similar Lamniformes order)

Fossilized gastropod (snail)

Silicified or calcite-replaced gastropod fossil; exact genus indeterminate

Fossiliferous limestone

Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing visible marine fossils

Crinoid Stem Fossil (in matrix)

Crinoid (Class Crinoidea)

Fossiliferous Limestone

Biogenic Limestone containing marine invertebrate fossils

Fossil Sea Urchin (Echinoid)

Echinoidea fossil (often replaced by silica or calcite)

Likely fossilized coral with polished blue calcite or aragonite specimen

Fossil coral, commonly Scleractinia; blue material likely dyed or treated calcite/aragonite

Likely weathered fossil-bearing limestone

Calcareous sedimentary rock, primarily calcite (CaCO₃); fossil identity uncertain from the image

Fossiliferous limestone

Bioclastic limestone, predominantly calcite (CaCO₃)

Fossiliferous Limestone

Biogenic Limestone (CaCO3 with fossil fragments)

Ironstone Concretion

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Fossiliferous Limestone (with Crinoids/Coral)

Fossiliferous Limestone (CaCO3)

Vesicular basalt (possibly weathered scoria)

Basaltic volcanic rock; chiefly plagioclase, clinopyroxene, and Fe–Mg oxides, with vesicles from trapped gas

Ironstone Concretion

Ironstone (Limonite/Goethite/Hematite mixture)

Rounded limestone pebble

Micritic limestone, composed mainly of calcite (CaCO₃)

Polished yellow jasper or iron-rich chert

Microcrystalline quartz (SiO₂) with iron-oxide inclusions

Sandstone (Iron-stained)

Clastic sedimentary rock (SiO2 with Fe2O3 staining)

Probable fossil tooth fragment

Indeterminate fossilized vertebrate tooth; species cannot be identified from this image

Megalodon Tooth

Otodus megalodon

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Ammonite Fossil (Iridiscent)

Ammonoidea (subclass)

Fossil Shark Tooth

Squalicorax (likely Squalicorax pristodontus or Squalicorax falcatus)

Fossil Shark Tooth

Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna

Fossil coral pebble

Likely fossilized colonial coral, commonly Favosites or a related tabulate coral

Fossil brachiopod shell

Likely a spiriferid or orthid brachiopod; shell composed mainly of calcium carbonate (calcite)

Coral Fossil Rock (Syringopora)

Syringopora (Organ-pipe Coral fossil in Limestone matrix)

Coral Fossil (Favosites)

Favosites (Extinct genus of tabulate corals)

Fossilized Syringopora (Piping Organ Coral)

Syringopora (Extinct Genus of Tabulate Coral)

Petrified Wood

Silicified wood (SiO2)

Fossilized Bivalve Shell (Fossilized Clam)

Bivalvia (class) / CaCO3 (Calcium Carbonate)

Fossil Coral (Rugose Coral / Horn Coral fragment)

Rugosa (Tetracoralla) / Calcite (CaCO3)

Turritella Agate / Fossiliferous Limestone

Elimia tenera (commonly mislabeled as Turritella in chalcedony/calcite matrix)

Fossilized Gastropod Shell

Gastropoda (Fossilized internal mold or shell body)

Fossilized Shark Tooth (Carcharocles/Otodus or Sand Tiger Shark Tooth)

Elasmobranchii (Fossilized Tooth)

Fossiliferous Limestone / Fossil Fragment

Calcium Carbonate (CaCO3) with indeterminate biogenic remains

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Rugose Coral Fossil

Order Rugosa

Coal

Bituminous Coal / Anthracite

Lepidodendron Fossil (Scale Tree)

Lepidodendron