Rock Identifier

Category

Fossil

Browse fossil specimens identified by the Rock Identifier community.

Learn about Fossil in the encyclopedia

Fossil Opal

Bone Opal

Turritella Jasper

Amber

Fossiliferous Limestone

Fossiliferous Limestone

Turritella Agate

Turritella Agate

Petrified Wood

Diatomite

Guano

Jet

Diatomaceous Earth

Opalized Wood

Fossiliferous Rock (Invertebrate Fossil in Matrix) (Fossiliferous limestone or shaly matrix containing skeletal fossil remains) — fossil

Fossiliferous Rock (Invertebrate Fossil in Matrix)

Fossiliferous limestone or shaly matrix containing skeletal fossil remains

Fossil Bone Fragment (Petrified bone (permineralized hydroxyapatite)) — fossil

Fossil Bone Fragment

Petrified bone (permineralized hydroxyapatite)

Fossiliferous Shale (Fossiliferous Mudstone / Shale) — sedimentary

Fossiliferous Shale

Fossiliferous Mudstone / Shale

Weathered sandstone or iron-stained sedimentary rock (Quartz-rich sandstone, possibly ferruginous sandstone) — sedimentary

Weathered sandstone or iron-stained sedimentary rock

Quartz-rich sandstone, possibly ferruginous sandstone

Weathered limestone fragment (Calcitic limestone (mostly CaCO₃; possibly micritic limestone)) — sedimentary

Weathered limestone fragment

Calcitic limestone (mostly CaCO₃; possibly micritic limestone)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Fossilized Bivalve in Limestone (Class Bivalvia within Sedimentary Matrix (likely CaCO3)) — fossil

Fossilized Bivalve in Limestone

Class Bivalvia within Sedimentary Matrix (likely CaCO3)

Crinoid Fossil Fragment (Crinoid stem fossil (Echinodermata)) — fossil

Crinoid Fossil Fragment

Crinoid stem fossil (Echinodermata)

Fossil Coral (Rugose or Tabulate Coral Fossil (CaCO3 replacement)) — fossil

Fossil Coral

Rugose or Tabulate Coral Fossil (CaCO3 replacement)

Fossil Coral (Rugose Coral or Tabulate Coral (Phylum Cnidaria)) — fossil

Fossil Coral

Rugose Coral or Tabulate Coral (Phylum Cnidaria)

Belemnite Fossil (Guardsman Fossil) (Belemnitella spp. (Rostrum)) — fossil

Belemnite Fossil (Guardsman Fossil)

Belemnitella spp. (Rostrum)

Fossilized Trilobite Pygidium / Glabella Fragment (Trilobita (e.g., Phacops or Ceraurus sp.)) — fossil

Fossilized Trilobite Pygidium / Glabella Fragment

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

Weathered fossiliferous limestone (Calcitic limestone, predominantly calcium carbonate (CaCO₃), possibly containing shell or coral fossil fragments) — sedimentary

Weathered fossiliferous limestone

Calcitic limestone, predominantly calcium carbonate (CaCO₃), possibly containing shell or coral fossil fragments

Turritella Agate (Elimia Agate) (Silicified Elimia tenera (formerly misidentified as Turritella)) — sedimentary (silicified fossiliferous chalcedony)

Turritella Agate (Elimia Agate)

Silicified Elimia tenera (formerly misidentified as Turritella)

sedimentary (silicified fossiliferous chalcedony)

Brachiopod Fossil (Rhynchonellida (Order)) — sedimentary

Brachiopod Fossil

Rhynchonellida (Order)

Fossiliferous Brachiopod in Shale (Brachiopoda (Phylum) preserved in Carbonaceous Shale) — sedimentary

Fossiliferous Brachiopod in Shale

Brachiopoda (Phylum) preserved in Carbonaceous Shale

Shark Tooth Fossil (Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)) — fossil

Shark Tooth Fossil

Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)

Tumbled fossil coral or carbonate fossil fragment (Likely fossilized coral, composed mainly of calcite (CaCO₃); exact identification is uncertain from the image) — fossil

Tumbled fossil coral or carbonate fossil fragment

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

Echinoid Fossil (Sea Urchin Fossil) (Echinoidea) — fossil

Echinoid Fossil (Sea Urchin Fossil)

Echinoidea

Fossil-bearing Sedimentary Rock (Sedimentum cum fossili) — fossil

Fossil-bearing Sedimentary Rock

Sedimentum cum fossili

Fossiliferous limestone, likely coral or shell-rich fragment (Calcite (CaCO₃), commonly bioclastic limestone containing fossilized marine organisms) — fossil

Fossiliferous limestone, likely coral or shell-rich fragment

Calcite (CaCO₃), commonly bioclastic limestone containing fossilized marine organisms

Fossil Crab (Decapoda (likely Avitelmessus or Raninidae family)) — sedimentary

Fossil Crab

Decapoda (likely Avitelmessus or Raninidae family)

Fossilized Gastropod / Coral (Phylum Mollusca / Cnidaria (Silicified or Calcified)) — fossil

Fossilized Gastropod / Coral

Phylum Mollusca / Cnidaria (Silicified or Calcified)

Fossilized Bone (Permineralized Vertebrate Bone) — fossil

Fossilized Bone

Permineralized Vertebrate Bone

Fossil Shark Tooth (Chondrichthyes (class)) — fossil

Fossil Shark Tooth

Chondrichthyes (class)

Siltstone with plant fossil impression (Sedimentary rock with Archaeopteris or Calamites flora impression) — fossil

Siltstone with plant fossil impression

Sedimentary rock with Archaeopteris or Calamites flora impression

Bivalve Fossil (Clam) (Class Bivalvia (e.g., Exogyra or Gryphaea species)) — fossil

Bivalve Fossil (Clam)

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

Fossil oyster shell fragment (Fossilized oyster (Ostreidae), composed mainly of calcite (CaCO₃)) — fossil

Fossil oyster shell fragment

Fossilized oyster (Ostreidae), composed mainly of calcite (CaCO₃)

Fossil coral limestone (Fossilized colonial coral, commonly tabulate or rugose coral in calcite-rich limestone (CaCO₃)) — fossil

Fossil coral limestone

Fossilized colonial coral, commonly tabulate or rugose coral in calcite-rich limestone (CaCO₃)

Small weathered fossil or mineral fragment (Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral) — fossil

Small weathered fossil or mineral fragment

Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral

Fossiliferous Sandstone (with Brachiopod or Bivalve mold) (Clastic Sedimentary Rock with Macrofossil Mold) — sedimentary

Fossiliferous Sandstone (with Brachiopod or Bivalve mold)

Clastic Sedimentary Rock with Macrofossil Mold

Fossiliferous Limestone with Crinoid Stem (Sedimentary Rock with Echinodermata fossil fragment) — fossil

Fossiliferous Limestone with Crinoid Stem

Sedimentary Rock with Echinodermata fossil fragment

Fossiliferous Sedimentary Rock (Sedimentary limestone with invertebrate fossil imprint) — fossil

Fossiliferous Sedimentary Rock

Sedimentary limestone with invertebrate fossil imprint

Fossilized Nut / Coprolite / Concretion (Trace Fossil / Permineralized Plant Material) — fossil

Fossilized Nut / Coprolite / Concretion

Trace Fossil / Permineralized Plant Material

Fossil Shark Tooth (Otodus sp. (Eocene shark fossil)) — fossil

Fossil Shark Tooth

Otodus sp. (Eocene shark fossil)

Fossil Sea Urchin / Echinoid (Class Echinoidea) — fossil

Fossil Sea Urchin / Echinoid

Class Echinoidea

Fossilized Shark Tooth (Elasmobranchii (tooth fossil, composed mainly of Bioapatite / Calcium Phosphate)) — fossil

Fossilized Shark Tooth

Elasmobranchii (tooth fossil, composed mainly of Bioapatite / Calcium Phosphate)

Mammoth or Mastodon Tooth Fossil (Mammuthus / Mammut tooth) — fossil

Mammoth or Mastodon Tooth Fossil

Mammuthus / Mammut tooth

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Dinosaur Fossil Tooth (Vertebrate Fossilized Tooth) — fossil

Dinosaur Fossil Tooth

Vertebrate Fossilized Tooth

Fossil Shark Tooth (Chondrichthyes (Class)) — fossil

Fossil Shark Tooth

Chondrichthyes (Class)

Mammoth Molar Fossil (Mammuthus primigenius (Tooth fragment)) — fossil

Mammoth Molar Fossil

Mammuthus primigenius (Tooth fragment)