Sedimentary (Fossil)

Fossil Snail

Gastropoda (fossilized)

Fossiliferous Sedimentary Rock

Sedimentary Rock with Invertebrate Fossil Imprint

Fossilized Gastropod Internal Mold

Gastropoda (Steinkern fossil)

Fossil shark tooth

Likely fossilized shark tooth, possibly Carcharhinus or a related requiem shark

Fossiliferous limestone, likely coral or shell-rich limestone

Biogenic calcite (CaCO₃), commonly limestone containing fossil coral or mollusks

Fossilized Tooth

Vertebrate Fossilized Tooth (Mineralized Biogenic Material)

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Biogenic Fossils

Fossiliferous limestone

Bioclastic limestone, primarily calcite (CaCO₃)

Fossilized shell-bearing limestone

Bioclastic limestone, likely molluscan/coquina limestone (calcite, CaCO₃)

Orthoceratid Fossil in Limestone

Orthoceras (extinct genus of Nautiloid Cephalopod)

Devil's Toenail (Fossil Oyster)

Gryphaea arcuata (Calcium Carbonate, CaCO3)

Fossiliferous Sandstone Pebble (with Crinoid / Shell Impression)

Sandstone containing fossiliferous inclusions (SiO2 matrix with calcite/silica cast fossil)

Fossiliferous Limestone or Mudstone

Sedimentary Rock with Invertebrate Fossils

Fossilized Fish (Lepidotes)

Lepidotes sp. (Order: Lepisosteiformes)

Fossiliferous Rock (Invertebrate Fossil in Matrix)

Fossiliferous limestone or shaly matrix containing skeletal fossil remains

Fossiliferous limestone (reef or shell-rich limestone)

Bioclastic calcarenite/calcirudite; predominantly calcite (CaCO₃)

Tumbled septarian nodule fragment (probable)

Septarian calcite–aragonite concretion with brown clay/mudstone matrix

Tumbled, weathered limestone or calcareous concretion

Calcite-rich limestone; predominantly calcium carbonate (CaCO₃)

Fossilized bivalve shell fragment

Fossil Mollusca, likely a pectinid or related bivalve; exact identification requires the other shell half and locality

Sandstone

Clastic Sedimentary Rock

Lepidodendron Fossil in Sandstone

Lepidodendron (Lycophytina, Lepidodendrales)

Fossilized Trilobite or Mollusk Fragment

Phylum Arthropoda / Mollusca fossil in sedimentary matrix

Fossiliferous Limestone (Crinoidal)

Calcite-bearing bioclastic packstone (CaCO3)

Fossil Coral

Tabulate Coral (potentially Favosites or Calapoecia)

Fossiliferous limestone

Bioclastic limestone, likely containing brachiopod or bivalve impressions

Bivalve Fossil (Internal Mold)

Bivalvia (Phalladomya or similar genus)

Polished fossil-bearing shale or mudstone

Fossiliferous carbonaceous mudstone/shale; visible fossils may be bivalves or ammonites, but species cannot be confirmed from the image

Fossil Snail

Gastropoda (fossilized)

Brachiopod Fossil

Phylum Brachiopoda (order potentially Spiriferida)

Crinoid Stem Fossil in Matrix

Crinoid (Class Crinoidea) in Limestone/Siltstone matrix

Bivalve Fossil (Clam)

Class Bivalvia (e.g., Exogyra or Gryphaea species)

Silicified fossil shell, likely fossil oyster or clam

Silicified bivalve fossil; shell originally aragonite/calcite, partly replaced by chalcedony (SiO₂)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossil bivalve shell fragment

Likely a ribbed oyster or scallop-type bivalve; exact genus requires locality and preservation details

Knightia Fossil in Limestone

Knightia eocaena in micritic limestone

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea

Fossiliferous limestone

Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)

Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)

Phylum Mollusca, Class Bivalvia

Fossil Shark Tooth

Selachii (fossilized dentition)

Fossilized Shark Tooth

Chondrichthyes tooth

Tumbled fossiliferous limestone

Bioclastic limestone, primarily calcite (CaCO₃)

Fossiliferous limestone

Bioclastic limestone, primarily calcite (CaCO₃)