Fossil

Fossil Shell (Brachiopod or Mollusk)

Phylum Brachiopoda or Class Bivalvia (e.g., Mucrospirifer or similar genus)

Orthoceras Fossil Limestone

Orthoceras sp. (Calcium Carbonate, CaCO3)

Weathered fossil shell or crinoid fragment

Likely fossilized echinoderm or bivalve fragment; exact taxon indeterminate from the image

Turritella Fossil

Turritella (Class Gastropoda, Family Turritellidae)

Fossil Brachiopod Cast (Atrypa species)

Phylum Brachiopoda, Class Rhynchonellata, Order Atrypida

Large bivalve shell fossil (possibly a clam)

Fossilized bivalve; exact taxon cannot be determined from the image

Fossil Coral (Petoskey / Favosites)

Favosites sp. / Hexagonaria sp. (Calcite/Silica pseudomorph)

Crinoid stem fossil

Crinoidea

Fossilized Shark Tooth

Carcharocles sp. or similar Lamniformes

Crinoid Fossil in Limestone

Crinoidea (class) in Fossiliferous Limestone

Rugose Coral Fossil (Horn Coral)

Order Rugosa (common genera include Zaphrentis or Heliophyllum)

Gastropod Fossil (Snail Steinkern)

Class Gastropoda fossil, composed of Calcium Carbonate (CaCO3)

Shark Tooth Fossil

Carcharodon / Otodus fossilized tooth (Calcium Phosphate / Hydroxyapatite)

Cockle Shell Fossil

Cardiidae family (Bivalvia)

Cockle Shell Fossil

Cardium (Bivalvia)

Fossil Shark Tooth

Chondrichthyes (Class)

Coal (Bituminous Coal)

Caustobiolith / Sedimentary Rock

Fossilized Ripple Marks or Stromatolite

Sedimentary ripple mark imprint / Biosedimentary structure

Fossilized Coral (Rugose or Tabulate) or Stromatolite

Phylum Cnidaria / Stromatolithus

Crinoid Stem Fossil

Crinoid columnal (Echinodermata)

Fossil Shark Tooth

Chondrichthyes (class)

Rugose Coral Fossil

Rugosa (Order) / Horn Coral

Limpets Shell / Fossil Specimen

Patellogastropoda (Class)

Fossiliferous Kalkstein (Marl/Sandstone)

Fossiliferous calcarenite/siltstone

Bivalve Fossil (Internal Mold/Steinkern)

Class Bivalvia (Fossilized Mold)

Spinosaurus Tooth

Spinosaurus aegyptiacus (fossilized in Hydroxyapatite)

Fossiliferous Limestone

Calcite-rich sedimentary rock with invertebrate fossils (CaCO3)

Fossiliferous Chert or Limestone

Sedimentary rock containing fossilized marine invertebrates (likely crinoid stems or bryozoans)

Fossilized Brachiopod

Phylum Brachiopoda

Devil's Toenail

Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)

Fossiliferous Limestone with Crinoid stems

Calcite-rich Biogenic Sedimentary Rock (CaCO3)

Fossil bone, possibly a vertebra

Fossilized vertebrate bone; exact taxon cannot be determined from the image

Fossil Coral

Anthozoa fossil (Calcite / SiO2 replacement)

Sandstone and Conglomerate pebbles

Sedimentary clastic rock

Possible fossilized bone fragment

Indeterminate mineralized bone; taxon and age cannot be determined from the photo

Fossilized Shell Fragment

Bivalvia or Gastropoda (Class) fragment

Fossilized Oyster Shell

Gryphaea or Exogyra (Family Ostreidae)

Fossilized wood (petrified wood)

Silicified wood; commonly quartz/chalcedony (SiO₂) replacing wood tissue

Fossiliferous Limestone or Mudstone

Sedimentary Rock with Invertebrate Fossils

Belemnoit Fossil (Sea Squid Fossil)

Belemnitida (Order within Cephalopoda)

Fossiliferous limestone

Bioclastic limestone, composed mainly of calcite (CaCO₃)

Fossil ammonite

Ammonoidea; likely a small, weathered ammonite or ammonoid internal mold