Rock Identifier

Category

Sedimentary (Fossil)

Browse sedimentary (fossil) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Fossil) in the encyclopedia

Fossil Opal

Fossiliferous Limestone

Fossiliferous Limestone

Bone Opal

Turritella Jasper

Turritella Agate

Turritella Agate

Amber

Petrified Wood

Diatomite

Guano

Conglomerate

Jet

Diatomaceous Earth

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Echinoid Fossil (Sea Urchin) (Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)) — sedimentary

Echinoid Fossil (Sea Urchin)

Echinoidea (specifically likely Schizaster or similar genus), calcium carbonate (CaCO3)

Petrified Wood (Silicified Wood / Xylopal) — fossil

Petrified Wood

Silicified Wood / Xylopal

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Coquina (Biogenic Limestone (Calcite/Aragonite, CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcite/Aragonite, CaCO3)

Fossiliferous Limestone (Crinoidal) (Calcium Carbonate (CaCO3) - Limestone containing bioclasts) — sedimentary

Fossiliferous Limestone (Crinoidal)

Calcium Carbonate (CaCO3) - Limestone containing bioclasts

Fossil Coral (Honeycomb Coral) (Favosites (extinct genus of Tabulate coral)) — sedimentary

Fossil Coral (Honeycomb Coral)

Favosites (extinct genus of Tabulate coral)

Fossiliferous Limestone (Biogenic Calcium Carbonate (CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Coquina / Shell Bed) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Bed)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Petrified Wood (Silicified wood / Xylopal) — fossil

Petrified Wood

Silicified wood / Xylopal

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Coal (Bituminous Coal (organic sedimentary rock)) — sedimentary

Coal

Bituminous Coal (organic sedimentary rock)

Petrified Wood (Silicified wood (SiO2)) — sedimentary

Petrified Wood

Silicified wood (SiO2)

Fossilized Brachiopod (Brachiopoda (Class Rhynchonellata or Spiriferida)) — sedimentary

Fossilized Brachiopod

Brachiopoda (Class Rhynchonellata or Spiriferida)

Fossilized Bone Fragment (Permineralized Skeletal Element (Likely Vertebrate)) — sedimentary

Fossilized Bone Fragment

Permineralized Skeletal Element (Likely Vertebrate)

Fossilized Tabulate Coral (Honeycomb Coral) (Favosites (Order: Tabulata)) — sedimentary

Fossilized Tabulate Coral (Honeycomb Coral)

Favosites (Order: Tabulata)

Petoskey Stone (Hexagonaria percarinata) — sedimentary

Petoskey Stone

Hexagonaria percarinata

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone (with potential iron mineralization) (Arenite) — sedimentary

Sandstone (with potential iron mineralization)

Arenite

Ferruginous Sandstone (Ironstone) (Sedimentary rock with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone (Ironstone)

Sedimentary rock with Limonite/Goethite cement

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Fossilized Oyster (Devil's Toenail) (Gryphaea (extinct genus of bivalve mollusks)) — sedimentary

Fossilized Oyster (Devil's Toenail)

Gryphaea (extinct genus of bivalve mollusks)

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Sandstone (Arenite (SiO2 based with mineral cement)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cement)

Chert (containing Fossil Mold) (Silicon dioxide (SiO2)) — sedimentary

Chert (containing Fossil Mold)

Silicon dioxide (SiO2)

Shale (Argillaceous Sedimentary Rock) — sedimentary

Shale

Argillaceous Sedimentary Rock

Coal (specifically Bituminous or Anthracite) (Organic sedimentary rock; primarily Carbon (C) with varying H, S, O, N) — sedimentary

Coal (specifically Bituminous or Anthracite)

Organic sedimentary rock; primarily Carbon (C) with varying H, S, O, N

Ferruginous Sandstone (Ironstone) (Iron-rich Arenite) — sedimentary

Ferruginous Sandstone (Ironstone)

Iron-rich Arenite

Orthoceras Fossil Limestone (Orthoceras (extinct genus of cephalopod); Limestone matrix (CaCO3)) — sedimentary

Orthoceras Fossil Limestone

Orthoceras (extinct genus of cephalopod); Limestone matrix (CaCO3)

Chert (concretionary/nodular variant) (Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions) — sedimentary

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

Fossiliferous limestone (Calcite-rich limestone (CaCO₃), containing fossil shell or coral fragments) — sedimentary

Fossiliferous limestone

Calcite-rich limestone (CaCO₃), containing fossil shell or coral fragments

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Fossiliferous Limestone with Crinoid Stem Impression (Calcium Carbonate (CaCO3) matrix with Crinoidea fossil) — sedimentary

Fossiliferous Limestone with Crinoid Stem Impression

Calcium Carbonate (CaCO3) matrix with Crinoidea fossil

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.)

Limestone with Calcite Veining (Sedimentary Rock (Calcium Carbonate, CaCO3)) — sedimentary

Limestone with Calcite Veining

Sedimentary Rock (Calcium Carbonate, CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)