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

Shale (Sedimentary pelitic rock) — sedimentary

Shale

Sedimentary pelitic rock

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Shale (Fissile mudrock (composed of clay-sized particles and detrital grains)) — sedimentary

Shale

Fissile mudrock (composed of clay-sized particles and detrital grains)

Shale (Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)) — sedimentary

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Weathered brown stone, likely sandstone or iron-stained granite (Indeterminate; possible quartz-rich sandstone (quartz, feldspar, iron oxides)) — sedimentary

Weathered brown stone, likely sandstone or iron-stained granite

Indeterminate; possible quartz-rich sandstone (quartz, feldspar, iron oxides)

Chert (containing fossil leaf impression) (Microcrystalline silicon dioxide (SiO2)) — sedimentary

Chert (containing fossil leaf impression)

Microcrystalline silicon dioxide (SiO2)

Ferruginous Sandstone (with ripple marks) (Arenite with Iron-Oxide (Fe2O3) cement) — sedimentary

Ferruginous Sandstone (with ripple marks)

Arenite with Iron-Oxide (Fe2O3) cement

Siltstone or Fine-grained Sandstone pebble (Siltstone (primarily SiO2 with clay minerals)) — sedimentary

Siltstone or Fine-grained Sandstone pebble

Siltstone (primarily SiO2 with clay minerals)

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

Sandstone

Arenite (composed primarily of SiO2)

Coquina (Biogenic Limestone (Calcitic shells)) — sedimentary

Coquina

Biogenic Limestone (Calcitic shells)

Sandstone (likely Quartzose Sandstone) (Arenite (SiO2 predominantly)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 predominantly)

Ironstone Concretion (Moqui Marble) (Iron-oxide concretion (Fe2O3 / FeO(OH))) — sedimentary

Ironstone Concretion (Moqui Marble)

Iron-oxide concretion (Fe2O3 / FeO(OH))

Stream-Rounded Shale or Mudstone (Argillaceous sedimentary rock) — sedimentary

Stream-Rounded Shale or Mudstone

Argillaceous sedimentary rock

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

Fossilized Coral (Petoskey Stone type)

Hexagonaria percarinata (Fossilized Rugose Coral)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Sandstone (Ferruginous) (Arenite (with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Sandy Ironstone (Ferruginous Sandstone) — sedimentary

Sandy Ironstone

Ferruginous Sandstone

Ironstone Concretion (Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)) — sedimentary

Ironstone Concretion

Siderite or Ferruginous Concretion (FeCO3 or Iron Oxides)

Red Sandstone (Arenite (ferruginous sandstone)) — sedimentary

Red Sandstone

Arenite (ferruginous sandstone)

Polished orbicular granite (likely larvikite or orbicular diorite) (Quartz/feldspar-bearing granitoid with dark amphibole–biotite minerals; exact variety requires testing) — igneous

Polished orbicular granite (likely larvikite or orbicular diorite)

Quartz/feldspar-bearing granitoid with dark amphibole–biotite minerals; exact variety requires testing

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Chert (Siliceous Mudstone variant) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Siliceous Mudstone variant)

Microcrystalline quartz (SiO2)

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

Fossiliferous Limestone (Coral Rag)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone (Arenite (SiO2 based with various cements)) — sedimentary

Sandstone

Arenite (SiO2 based with various cements)

Chert (Nodule) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Sandstone (Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)) — sedimentary

Red Sandstone

Arenite (primarily Quartz, SiO2, with Iron Oxide cementing agent)

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

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone (Fossiliferous) (Calcium Carbonate (CaCO3) - Bioclastic Limestone) — sedimentary

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Coquina / Shelly Limestone (Bioclastic Limestone (composed of CaCO3)) — sedimentary

Coquina / Shelly Limestone

Bioclastic Limestone (composed of CaCO3)

Fossiliferous Limestone (Coquina / Shell Limestone) (Bioclastic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Bioclastic Limestone (CaCO3)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Sandstone (Weathered Cobble) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Weathered Cobble)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Banded Agate / Shell Fossil Fragment (Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)) — sedimentary

Banded Agate / Shell Fossil Fragment

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Limestone (Sedimentary rock composed mainly of calcium carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary rock composed mainly of calcium carbonate (CaCO3)

Limestone (CaCO3 (Limestone)) — sedimentary

Limestone

CaCO3 (Limestone)

Asphalt (Bituminous Rock) (Natural bitumen or Bituminous limestone/sandstone) — sedimentary

Asphalt (Bituminous Rock)

Natural bitumen or Bituminous limestone/sandstone

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Hag Stone (Perforated Flint or Chert (SiO2)) — sedimentary

Hag Stone

Perforated Flint or Chert (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (specifically Quartz Arenite)) — sedimentary

Sandstone

Arenite (specifically Quartz Arenite)