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

Weathered sandstone (Quartz-rich sandstone, likely ferruginous subarkose) — sedimentary

Weathered sandstone

Quartz-rich sandstone, likely ferruginous subarkose

Sea Glass (Teal/Turquoise) (Amorphous Silica (SiO2) with trace metal oxides) — Anthropogenic (Man-made material processed by nature)

Sea Glass (Teal/Turquoise)

Amorphous Silica (SiO2) with trace metal oxides

Anthropogenic (Man-made material processed by nature)

Slag Glass (Amorphous Silica / Glass Slag) — industrial byproduct (anthropogenic rock-like material)

Slag Glass

Amorphous Silica / Glass Slag

industrial byproduct (anthropogenic rock-like material)

Sea Glass (Turquoise/Aqua) (Amorphous Silica (SiO2) with transition metal dopants) — Anthropogenic (Man-made material processed by nature)

Sea Glass (Turquoise/Aqua)

Amorphous Silica (SiO2) with transition metal dopants

Anthropogenic (Man-made material processed by nature)

Weathered shale or mudstone (Clastic mudrock, chiefly clay minerals, quartz, and feldspar) — sedimentary

Weathered shale or mudstone

Clastic mudrock, chiefly clay minerals, quartz, and feldspar

Weathered sandstone or siltstone cobble (Clastic sedimentary rock, probably quartz-rich sandstone; exact identification requires testing) — sedimentary

Weathered sandstone or siltstone cobble

Clastic sedimentary rock, probably quartz-rich sandstone; exact identification requires testing

Polished fossil-bearing shale or mudstone (Fossiliferous carbonaceous mudstone/shale; visible fossils may be bivalves or ammonites, but species cannot be confirmed from the image) — fossil

Polished fossil-bearing shale or mudstone

Fossiliferous carbonaceous mudstone/shale; visible fossils may be bivalves or ammonites, but species cannot be confirmed from the image

Banded sandstone pebble (Quartz-rich sandstone, likely iron-oxide- and organic/mineral-stained; exact variety uncertain) — sedimentary

Banded sandstone pebble

Quartz-rich sandstone, likely iron-oxide- and organic/mineral-stained; exact variety uncertain

Brachiopod Fossil in Limestone (Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)) — sedimentary

Brachiopod Fossil in Limestone

Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)

Shale with Iron Staining (Fissile Mudrock (Sedimentary Rock)) — sedimentary

Shale with Iron Staining

Fissile Mudrock (Sedimentary Rock)

Shale (with Iron Staining) (Argillaceous mudstone / Shale) — sedimentary

Shale (with Iron Staining)

Argillaceous mudstone / Shale

Sandstone (Ferruginous) (Arenite (Fe-oxide cemented)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-oxide cemented)

Sandstone (River Cobble / Pebble) (Sedimentary Rock (Quartz Sandstone / Arenite)) — sedimentary

Sandstone (River Cobble / Pebble)

Sedimentary Rock (Quartz Sandstone / Arenite)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide cement)

Shale (Fissile Mudstone) — sedimentary

Shale

Fissile Mudstone

Sandstone (Ferruginous) (Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeOOH cement)

Chert Arrowhead (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

Weathered sandstone fragment (Quartz-rich sandstone (compositionally uncertain)) — sedimentary

Weathered sandstone fragment

Quartz-rich sandstone (compositionally uncertain)

Banded gneiss (Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss) — metamorphic

Banded gneiss

Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss

Jasper (Silicon dioxide (Microcrystalline Quartz, SiO2)) — sedimentary

Jasper

Silicon dioxide (Microcrystalline Quartz, SiO2)

Fossil gastropod shell (Fossilized gastropod, likely a small marine snail; exact genus cannot be determined from the image) — fossil

Fossil gastropod shell

Fossilized gastropod, likely a small marine snail; exact genus cannot be determined from the image

Small pale stone, possibly quartz or limestone (Indeterminate from image; likely quartz (SiO₂) or calcite-rich limestone (CaCO₃)) — mineral

Small pale stone, possibly quartz or limestone

Indeterminate from image; likely quartz (SiO₂) or calcite-rich limestone (CaCO₃)

Quartzite Sandstone / Quartz Sandstone (Quartz Sandstone (SiO2 with minor mineral impurities)) — sedimentary

Quartzite Sandstone / Quartz Sandstone

Quartz Sandstone (SiO2 with minor mineral impurities)

Rounded sandstone or quartz-rich sedimentary pebble (Likely quartz arenite/subarkose; exact identification requires testing) — sedimentary

Rounded sandstone or quartz-rich sedimentary pebble

Likely quartz arenite/subarkose; exact identification requires testing

Chert / Flint Arrowheads (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint Arrowheads

Cryptocrystalline Quartz (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.) (Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)) — mineral

Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)

Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)

Polished brown river pebble (likely chert or fine-grained sandstone) (Indeterminate; probable microcrystalline quartz (chert) or quartz-rich sandstone) — sedimentary

Polished brown river pebble (likely chert or fine-grained sandstone)

Indeterminate; probable microcrystalline quartz (chert) or quartz-rich sandstone

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Celestine (Celestite) (Strontium sulfate (SrSO4)) — mineral

Celestine (Celestite)

Strontium sulfate (SrSO4)

Halite (Rock Salt) (Halite (Sodium Chloride, NaCl)) — mineral

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Sandstone (Sedimentary rock composed mainly of quartz sand) — sedimentary

Sandstone

Sedimentary rock composed mainly of quartz sand

Fossiliferous Sandstone / Fossil Fragment (Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material) — fossil

Fossiliferous Sandstone / Fossil Fragment

Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material

Quartz-veined Sandstone Pebble (Quartzose Sandstone with Quartz Veinlets) — sedimentary

Quartz-veined Sandstone Pebble

Quartzose Sandstone with Quartz Veinlets

Weathered iron-rich sandstone or ferruginous siltstone (Clastic sedimentary rock, likely quartz-rich sandstone cemented by iron oxides (Fe₂O₃/Fe₃O₄)) — sedimentary

Weathered iron-rich sandstone or ferruginous siltstone

Clastic sedimentary rock, likely quartz-rich sandstone cemented by iron oxides (Fe₂O₃/Fe₃O₄)

Banded Sandstone (River Pebble) (Arenite (SiO2 primarily)) — sedimentary

Banded Sandstone (River Pebble)

Arenite (SiO2 primarily)

Banded Sedimentary Rock (Sedimentary rock with Liesegang banding) — sedimentary

Banded Sedimentary Rock

Sedimentary rock with Liesegang banding

Fossiliferous Sedimentary Rock (Sedimentary Rock with Invertebrate Fossil Imprint) — fossil

Fossiliferous Sedimentary Rock

Sedimentary Rock with Invertebrate Fossil Imprint

Shale with Trace Fossils (Fissile mudrock (Shale)) — sedimentary

Shale with Trace Fossils

Fissile mudrock (Shale)

Shale (Shale (clastic sedimentary rock)) — sedimentary

Shale

Shale (clastic sedimentary rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite