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

Amber

Turritella Agate

Turritella Agate

Petrified Wood

Diatomite

Guano

Conglomerate

Jet

Diatomaceous Earth

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Coal (Bituminous or Anthracite coal (carbon-rich sedimentary rock)) — sedimentary

Coal

Bituminous or Anthracite coal (carbon-rich sedimentary rock)

Coprolite (Fossilized Feces) — sedimentary

Coprolite

Fossilized Feces

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

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Sandstone (Sandstone (Quartz-rich sedimentary rock)) — sedimentary

Sandstone

Sandstone (Quartz-rich sedimentary rock)

Hag Stone (Perforated Sedimentary Rock) — sedimentary

Hag Stone

Perforated Sedimentary Rock

Fossiliferous Limestone (Sedimentary Calcium Carbonate (CaCO3) Matrix with Fossil Fragments) — fossil

Fossiliferous Limestone

Sedimentary Calcium Carbonate (CaCO3) Matrix with Fossil Fragments

Fossilized bivalve shell (Bivalvia indeterminate; likely a preserved clam or cockle shell, composed mainly of calcium carbonate (CaCO₃)) — fossil

Fossilized bivalve shell

Bivalvia indeterminate; likely a preserved clam or cockle shell, composed mainly of calcium carbonate (CaCO₃)

Petrified wood (Silicified wood; commonly quartz/chalcedony (SiO₂) replacing organic tissue) — fossil

Petrified wood

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

Polished fossil coral (Fossilized coral, commonly agatized coral (silica replacing CaCO₃)) — fossil

Polished fossil coral

Fossilized coral, commonly agatized coral (silica replacing CaCO₃)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Red) (Arenite (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Red)

Arenite (primarily SiO2 with Fe2O3)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Carved Statue) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Carved Statue)

Calcium Carbonate (CaCO3)

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

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Limestone with Secondary Mineralization (Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Secondary Mineralization

Calcium Carbonate (CaCO3)

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

Sandstone

Arenite (composed primarily of SiO2)

Fossiliferous limestone (Calcite-rich carbonate rock; chiefly CaCO₃ (often bioclastic limestone)) — sedimentary

Fossiliferous limestone

Calcite-rich carbonate rock; chiefly CaCO₃ (often bioclastic limestone)

Weathered limestone or calcareous sandstone (Likely micritic limestone (calcite, CaCO₃), possibly carbonate-rich sandstone) — sedimentary

Weathered limestone or calcareous sandstone

Likely micritic limestone (calcite, CaCO₃), possibly carbonate-rich sandstone

Jasper (likely Kambaba or Crocodile Jasper variety) (Silicon Dioxide (SiO2) with inclusions) — sedimentary

Jasper (likely Kambaba or Crocodile Jasper variety)

Silicon Dioxide (SiO2) with inclusions

Fossilized Brachiopod (Brachiopoda (Phylum)) — fossil

Fossilized Brachiopod

Brachiopoda (Phylum)

Dalmatian jasper (likely orbicular rhyolite) (Silica-rich rhyolite, commonly sold as Dalmatian jasper; typically quartz, feldspar, and dark amphibole/biotite inclusions) — igneous

Dalmatian jasper (likely orbicular rhyolite)

Silica-rich rhyolite, commonly sold as Dalmatian jasper; typically quartz, feldspar, and dark amphibole/biotite inclusions

Coquina or Fossiliferous Limestone (Fossiliferous Calcarenite (CaCO3)) — sedimentary

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Sandstone (Quartz Arenite / Sedimentary Rock) — sedimentary

Sandstone

Quartz Arenite / Sedimentary Rock

Petrified Wood and Mixed Rocks (Silicified Wood (SiO2)) — fossil

Petrified Wood and Mixed Rocks

Silicified Wood (SiO2)

Fossil-bearing sandstone or mudstone (Indeterminate sedimentary matrix with a possible bivalve or shell fossil) — fossil

Fossil-bearing sandstone or mudstone

Indeterminate sedimentary matrix with a possible bivalve or shell fossil

Petrified Wood / Fossilized Bone (Silicified / Mineralized Fossil (Silica SiO2)) — fossil

Petrified Wood / Fossilized Bone

Silicified / Mineralized Fossil (Silica SiO2)

Fossiliferous Limestone (Calcium Carbonate (CaCO3) matrix with biogenic fragments) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) matrix with biogenic fragments

Coprolite (Fossilized Feces) — fossil

Coprolite

Fossilized Feces

Fossil Shark Tooth (Carcharocles or Lamniformes (order)) — fossil

Fossil Shark Tooth

Carcharocles or Lamniformes (order)

Weathered limestone fragment (Limestone, composed primarily of calcite (CaCO₃)) — sedimentary

Weathered limestone fragment

Limestone, composed primarily of calcite (CaCO₃)

Weathered limestone fragment (Limestone, chiefly calcite (CaCO₃), possibly fossiliferous or dolomitic) — sedimentary

Weathered limestone fragment

Limestone, chiefly calcite (CaCO₃), possibly fossiliferous or dolomitic

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

Weathered limestone

Calcite-rich carbonate rock (mostly CaCO₃), possibly fossiliferous limestone

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)

Hematite Concretion (Iron oxide (Fe2O3) in concretionary form) — sedimentary

Hematite Concretion

Iron oxide (Fe2O3) in concretionary form

Likely limestone fragment (Limestone, predominantly calcite (CaCO₃)) — sedimentary

Likely limestone fragment

Limestone, predominantly calcite (CaCO₃)

Concretion in Shale (Siltstone/Shale with Siderite or Calcareous concretions) — sedimentary

Concretion in Shale

Siltstone/Shale with Siderite or Calcareous concretions

Sandstone (Ferruginous) (Arenite (with Goethite/Limonite cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)