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

Fossiliferous Chert (with Brachiopod or Mollusk fragments) (Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions) — sedimentary

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Cone-in-cone structure (Limestone) (Cone-in-cone structure (Secondary Sedimentary Structure)) — sedimentary

Cone-in-cone structure (Limestone)

Cone-in-cone structure (Secondary Sedimentary Structure)

Gastropod Fossil (Steinkern) (Class Gastropoda (internal mold)) — fossil

Gastropod Fossil (Steinkern)

Class Gastropoda (internal mold)

Lepidodendron Plant Fossil (Lepidodendron sp. (Lycopodiophyta)) — fossil

Lepidodendron Plant Fossil

Lepidodendron sp. (Lycopodiophyta)

Fossilized Shark Tooth (Basal Bone) (Otodus sp. (Mineralized Hydroxyapatite)) — sedimentary

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Concretion (Calcareous or ferruginous concretion) — sedimentary

Concretion

Calcareous or ferruginous concretion

Likely fossilized shell or carbonate concretion (Indeterminate biogenic calcium carbonate, commonly calcite (CaCO₃)) — fossil

Likely fossilized shell or carbonate concretion

Indeterminate biogenic calcium carbonate, commonly calcite (CaCO₃)

Mother of Pearl (Nacre) / Shell Fragment (Biogenic Calcium Carbonate (Aragonite and Conchiolin)) — fossil

Mother of Pearl (Nacre) / Shell Fragment

Biogenic Calcium Carbonate (Aragonite and Conchiolin)

Sand Dollar (Fossilized or Calcium Carbonate Skeleton) (Clypeasteroida (Order)) — fossil

Sand Dollar (Fossilized or Calcium Carbonate Skeleton)

Clypeasteroida (Order)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Ammonite Fossil (Ammonoidea (subclass)) — fossil

Ammonite Fossil

Ammonoidea (subclass)

Siltstone Concretion (Carbonate-cemented Siltstone Concretion) — sedimentary

Siltstone Concretion

Carbonate-cemented Siltstone Concretion

Polished fossiliferous limestone (Bioclastic limestone, commonly crinoidal limestone (calcite, CaCO₃)) — sedimentary

Polished fossiliferous limestone

Bioclastic limestone, commonly crinoidal limestone (calcite, CaCO₃)

Fossil Shark Tooth (Lamniformes (order) - likely Cretalamna or Carcharias species) — fossil

Fossil Shark Tooth

Lamniformes (order) - likely Cretalamna or Carcharias species

Shale (Fissile Mudstone (primarily composed of clay minerals and quartz grains)) — sedimentary

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz grains)

Sandstone (likely Graywacke or Arkose variant) (Clastic Sedimentary Rock (SiO2 dominated)) — sedimentary

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 dominated)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)) — fossil

Petrified Wood

Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)

Chert Pebble (with fossil shell fragment) (Microcrystalline Quartz (SiO2) with Calcified Invertebrate Impression) — sedimentary

Chert Pebble (with fossil shell fragment)

Microcrystalline Quartz (SiO2) with Calcified Invertebrate Impression

Weathered limestone slab (Micritic limestone, primarily calcite (CaCO₃)) — sedimentary

Weathered limestone slab

Micritic limestone, primarily calcite (CaCO₃)

Petrified Wood (Silicified Wood (primarily Chalcedony/Quartz, SiO2)) — fossil

Petrified Wood

Silicified Wood (primarily Chalcedony/Quartz, SiO2)

Fossilized Gastropod Shell (Gastropoda (Class) replacement / internal cast (steinkern)) — fossil

Fossilized Gastropod Shell

Gastropoda (Class) replacement / internal cast (steinkern)

Sandstone (Quartzose) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite/Quartz Arenite) — sedimentary

Sandstone

Arenite/Quartz Arenite

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Weathered limestone (Calcite-rich limestone (CaCO₃), possibly fossiliferous or dolomitic) — sedimentary

Weathered limestone

Calcite-rich limestone (CaCO₃), possibly fossiliferous or dolomitic

Sandstone (Sandstone (clastic sedimentary rock)) — sedimentary

Sandstone

Sandstone (clastic sedimentary rock)

Bivalve Fossil (Clam) (Class Bivalvia, likely Mercenaria or similar genus) — fossil

Bivalve Fossil (Clam)

Class Bivalvia, likely Mercenaria or similar genus

Weathered carbonate rock, possibly fossiliferous limestone (Calcite-rich limestone (CaCO₃), tentative identification) — sedimentary

Weathered carbonate rock, possibly fossiliferous limestone

Calcite-rich limestone (CaCO₃), tentative identification

Chert (and Fossiliferous Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Fossiliferous Chert)

Silicon Dioxide (SiO2)

Shark Tooth Fossil (Otodus sp. (possibly Cretalamna)) — fossil

Shark Tooth Fossil

Otodus sp. (possibly Cretalamna)

Palm Wood Fossil (Palmoxylon) — fossil

Palm Wood Fossil

Palmoxylon

Fossiliferous Mudstone / River Pebble (Sedimentary rock with trace fossil or inclusion) — sedimentary

Fossiliferous Mudstone / River Pebble

Sedimentary rock with trace fossil or inclusion

Fossiliferous Siltstone (Clastic Sedimentary Rock with Fossil Inclusions) — sedimentary

Fossiliferous Siltstone

Clastic Sedimentary Rock with Fossil Inclusions

Megalodon Shark Tooth Fossil (Otodus megalodon (fossilized in sedimentary matrix)) — sedimentary

Megalodon Shark Tooth Fossil

Otodus megalodon (fossilized in sedimentary matrix)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Chert (Chert with Crinoid Stem Impression) (Chert (SiO2) with fossil Anthozoan or Crinoid columnals) — sedimentary

Fossiliferous Chert (Chert with Crinoid Stem Impression)

Chert (SiO2) with fossil Anthozoan or Crinoid columnals

Augite Shell / Turret Snail Fossil (or Recent Seashell) (Gastropoda (Class) / Turritellidae (Family)) — fossil

Augite Shell / Turret Snail Fossil (or Recent Seashell)

Gastropoda (Class) / Turritellidae (Family)

Coprolite (Coprolite (fossilized feces)) — fossil

Coprolite

Coprolite (fossilized feces)

Fossilized Oyster Shell (Exogyra or Ostrea (Gryphaeidae/Ostreidae family)) — fossil

Fossilized Oyster Shell

Exogyra or Ostrea (Gryphaeidae/Ostreidae family)