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 (variations include Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (variations include Flint)

Chert (Silicon Dioxide, SiO2)

Sandstone (Arenite (primarily SiO2 with various cementing agents)) — sedimentary

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Crinoid Stem Fossil (in matrix) (Crinoid (Class Crinoidea)) — fossil

Crinoid Stem Fossil (in matrix)

Crinoid (Class Crinoidea)

Shale (with minor calcite veining) (Clastic sedimentary rock (primarily clay minerals and quartz)) — sedimentary

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Siltstone (Siltstone) — sedimentary

Siltstone

Siltstone

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Petrified Wood (Silicified wood (Quartz / Chalcedony replacement)) — fossil

Petrified Wood

Silicified wood (Quartz / Chalcedony replacement)

Fossilized Shark Tooth (Megalodon or Carcharocles species fragment) (Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)) — fossil

Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)

Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)

Fossilized Shell Fragment / Mother of Pearl (Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral) — fossil

Fossilized Shell Fragment / Mother of Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral

Fossil Shark Tooth (Sand Tiger Shark type) (Carcharias sp. (likely Odontaspis)) — fossil

Fossil Shark Tooth (Sand Tiger Shark type)

Carcharias sp. (likely Odontaspis)

Turritella Agate (Elimia tenera silicified fossiliferous chalcedony) — fossil

Turritella Agate

Elimia tenera silicified fossiliferous chalcedony

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (likely Arkosic or Lithic Sandstone) (Arenite (SiO2 based with mineral inclusions)) — sedimentary

Sandstone (likely Arkosic or Lithic Sandstone)

Arenite (SiO2 based with mineral inclusions)

Biotite granite (weathered granitic rock) (Granite; chiefly quartz (SiO₂), feldspar, and biotite mica) — igneous

Biotite granite (weathered granitic rock)

Granite; chiefly quartz (SiO₂), feldspar, and biotite mica

Chert (specifically a stream-worn Chert Nodule) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Coral Fossil (Petoskey-style or Colonial) (Hexagonaria percarinata (Order: Rugosa)) — fossil

Coral Fossil (Petoskey-style or Colonial)

Hexagonaria percarinata (Order: Rugosa)

Petoskey Stone (Hexagonaria percarinata) — sedimentary

Petoskey Stone

Hexagonaria percarinata

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone Pebble (Arenite (primarily SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

Chert Nodules (Limonitic Chert) (Cryptocrystalline Quartz (SiO2) with Hydrated Iron Oxides) — sedimentary

Chert Nodules (Limonitic Chert)

Cryptocrystalline Quartz (SiO2) with Hydrated Iron Oxides

Shark Tooth Fossil (Carcharhiniformes or Lamniformes (order level fossil)) — fossil

Shark Tooth Fossil

Carcharhiniformes or Lamniformes (order level fossil)

Limestone (Weathered Pebble) (Calcium Carbonate (CaCO3) / Limestone) — sedimentary

Limestone (Weathered Pebble)

Calcium Carbonate (CaCO3) / Limestone

Chert (specifically Blue Chert/Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Spinosaurid Dinosaur Tooth (Spinosaurus aegyptiacus (fossilized)) — fossil

Spinosaurid Dinosaur Tooth

Spinosaurus aegyptiacus (fossilized)

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Sandstone (SiO2 with Fe2O3 cement)) — sedimentary

Ferruginous Sandstone

Sandstone (SiO2 with Fe2O3 cement)

Chert (or Fossiliferous Limestone) (Microcrystalline Quartz (SiO2) / Calcium Carbonate (CaCO3)) — sedimentary

Chert (or Fossiliferous Limestone)

Microcrystalline Quartz (SiO2) / Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (with Iron Oxides)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Chert (Chert Nodule with Cortex) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chert Nodule with Cortex)

Microcrystalline Quartz (SiO2)

Ironstone Concretion (Limonite/Goethite) (Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)

Fossilized Brachiopod (Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)) — sedimentary

Fossilized Brachiopod

Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)

Asphalt Concrete (Bituminous Concrete (Anthropic Rock)) — sedimentary

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous) (Arenite (Fe-rich SiO2)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)

Chert pebble (Microcrystalline silica (SiO2)) — sedimentary

Chert pebble

Microcrystalline silica (SiO2)

Chert Nodule (Commonly known as a Flint or River Cobble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (Commonly known as a Flint or River Cobble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Nodule) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Nodule)

Chert (Silicon Dioxide, SiO2)

Sandstone Cobble (Arenite (Secondary classification based on grain size)) — sedimentary

Sandstone Cobble

Arenite (Secondary classification based on grain size)

Red Mudstone (Siltstone) (Lutite (primarily Quartz and Clay minerals with Hematite)) — sedimentary

Red Mudstone (Siltstone)

Lutite (primarily Quartz and Clay minerals with Hematite)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (CaCO3 (principally composed of Calcite)) — sedimentary

Limestone

CaCO3 (principally composed of Calcite)