Rock Identifier

Category

Sedimentary (Anthropogenic)

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

Learn about Sedimentary (Anthropogenic) in the encyclopedia

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Coal

Kambaba Jasper

Limestone

Asphalt Rock

Claystone

Mudstone

Sapropel

Bituminous Shale

Bituminous Shale

Shale (Shale (fine-grained clastic sedimentary rock)) — Sedimentary

Shale

Shale (fine-grained clastic sedimentary rock)

Rounded brown pebble, likely weathered sandstone or iron-stained quartzite (Probable quartz-rich sandstone (SiO₂-dominated); exact identification requires testing) — sedimentary

Rounded brown pebble, likely weathered sandstone or iron-stained quartzite

Probable quartz-rich sandstone (SiO₂-dominated); exact identification requires testing

Weathered sandstone or siltstone (Clastic sedimentary rock, chiefly quartz and feldspar grains cemented by clay, silica, or iron oxides) — sedimentary

Weathered sandstone or siltstone

Clastic sedimentary rock, chiefly quartz and feldspar grains cemented by clay, silica, or iron oxides

Shale (or Mudstone) (Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock) — sedimentary

Shale (or Mudstone)

Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock

Chert (Tan/Yellow variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Tan/Yellow variety)

Microcrystalline quartz (SiO2)

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

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Shale (Mudrock / Fissile Shale) — sedimentary

Shale

Mudrock / Fissile Shale

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Banded Jasper (Mookaite / Chert) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Banded Jasper (Mookaite / Chert)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Fossil Coral (Tabulate Coral (potentially Favosites or Calapoecia)) — fossil

Fossil Coral

Tabulate Coral (potentially Favosites or Calapoecia)

Gastropod Steinkern (Internal Mold Fossil) (Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix) — sedimentary

Gastropod Steinkern (Internal Mold Fossil)

Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix

Chert (Common Opal/Chalcedony variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Fossil Shell (Invertebrate fossil (Mollusca)) — fossil

Fossil Shell

Invertebrate fossil (Mollusca)

Fossiliferous Limestone with Brachiopod (Phylum Brachiopoda in calcitic matrix) — sedimentary

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in calcitic matrix

Lepidodendron Fossil in Sandstone (Lepidodendron (Lycophytina, Lepidodendrales)) — sedimentary

Lepidodendron Fossil in Sandstone

Lepidodendron (Lycophytina, Lepidodendrales)

Agate (SiO2) — mineral

Agate

SiO2

Knightia Fossil in Limestone (Knightia eocaena in micritic limestone) — sedimentary

Knightia Fossil in Limestone

Knightia eocaena in micritic limestone

Puddingstone (Gowganda) (Gowganda Formation Conglomerate) — sedimentary

Puddingstone (Gowganda)

Gowganda Formation Conglomerate

Pebble (likely Quartz or Chert) (SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.) — Sedimentary Rock

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Sedimentary Rock

Red sandstone (Quartz-rich sandstone, commonly ferruginous (Fe-oxide stained)) — sedimentary

Red sandstone

Quartz-rich sandstone, commonly ferruginous (Fe-oxide stained)

Chert (Jasper/Opaline variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Opaline variety)

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Rock)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Quartz-veined Sandstone Pebble (Quartzite-veined Arenite) — sedimentary

Quartz-veined Sandstone Pebble

Quartzite-veined Arenite

Devil's Toenail (Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)) — sedimentary

Devil's Toenail

Gryphaea (extinct genus of foam oysters, typically composed of Calcite CaCO3)

Coal (Bituminous Coal / Anthracite) — sedimentary

Coal

Bituminous Coal / Anthracite

Limonite Geode (Ironstone Concretion) (Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior) — sedimentary

Limonite Geode (Ironstone Concretion)

Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior

Red Jasper (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron impurities

Blue Apatite (Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Sandstone Pebble (Quartz Sandstone) — sedimentary

Sandstone Pebble

Quartz Sandstone

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

Weathered limestone

Calcite-rich carbonate rock (mostly CaCO₃)

Fossilized shell fragment (Indeterminate fossil mollusk; likely a silicified or mineral-replaced bivalve/gastropod fragment) — fossil

Fossilized shell fragment

Indeterminate fossil mollusk; likely a silicified or mineral-replaced bivalve/gastropod fragment

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Red Sandstone (Quartz Arenite (iron-stained)) — sedimentary

Red Sandstone

Quartz Arenite (iron-stained)

Sandstone / Weathered Quartzite (Sandstone (Quartz Arenite)) — sedimentary

Sandstone / Weathered Quartzite

Sandstone (Quartz Arenite)

Sandstone (Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)) — sedimentary

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)

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

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Sandstone (Water-worn Pebble) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)