Rock Identifier

Category

Sedimentary

Browse sedimentary specimens identified by the Rock Identifier community.

Learn about Sedimentary in the encyclopedia

Argillite

Arkose

Banded Iron Formation

Banded Iron Formation

Bauxite

Bituminous Coal

Bituminous Coal

Bituminous Shale

Bituminous Shale

Black Shale

Bog Iron

Breccia

Brecciated Jasper

Brecciated Jasper

Bumblebee Jasper

Bumblebee Jasper

Calcarenite

Banded Iron Formation (Banded Iron Formation (BIF)) — sedimentary

Banded Iron Formation

Banded Iron Formation (BIF)

Glauconitic Sandstone (Glauconitic sandstone ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic sandstone ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

Chert (Chalcedony-rich sedimentary rock) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony-rich sedimentary rock)

Cryptocrystalline Quartz (SiO2)

Weathered sandstone (Quartz-rich sandstone, locally iron-oxide stained (SiO₂-dominant)) — sedimentary

Weathered sandstone

Quartz-rich sandstone, locally iron-oxide stained (SiO₂-dominant)

Chert / Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Chert / Quartz Pebble

Silicon Dioxide (SiO2)

Brachiopod Fossil in Matrix (Phylum Brachiopoda) — fossil

Brachiopod Fossil in Matrix

Phylum Brachiopoda

Banded gneiss (Gneiss, chiefly quartz–feldspar–mica) — metamorphic

Banded gneiss

Gneiss, chiefly quartz–feldspar–mica

Moqui Marble (Shaman Stone) (Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)) — sedimentary

Moqui Marble (Shaman Stone)

Iron Oxide Concretion (Goethite/Hematite shell with Sandstone core)

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

Sandstone (Ferruginous)

Arenite (Fe-rich)

Chert (Beach Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Beach Pebble)

Microcrystalline Quartz (SiO2)

Polished black stone, likely hematite or black jasper (Hematite (Fe₂O₃) or opaque chalcedony/jasper (SiO₂); image-only identification is uncertain) — mineral

Polished black stone, likely hematite or black jasper

Hematite (Fe₂O₃) or opaque chalcedony/jasper (SiO₂); image-only identification is uncertain

Smooth gray river pebble (Likely fine-grained sandstone or siltstone; exact identification requires a fresh surface and tests) — sedimentary

Smooth gray river pebble

Likely fine-grained sandstone or siltstone; exact identification requires a fresh surface and tests

Honey calcite (orange calcite) (Calcite, calcium carbonate (CaCO₃)) — mineral

Honey calcite (orange calcite)

Calcite, calcium carbonate (CaCO₃)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Quartz Geode with Calcite (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)) — mineral

Quartz Geode with Calcite

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Red Jasper (Red Jasper (SiO2)) — sedimentary

Red Jasper

Red Jasper (SiO2)

Quartz on Host Rock (Silicon Dioxide (SiO2)) — Mineral Specimen

Quartz on Host Rock

Silicon Dioxide (SiO2)

Mineral Specimen

Jasper with Iron Staining (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Jasper with Iron Staining

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Chert Nodules in Sedimentary Rock (Microcrystalline Quartz (SiO2) within Clastic Matrix) — sedimentary

Chert Nodules in Sedimentary Rock

Microcrystalline Quartz (SiO2) within Clastic Matrix

Banded Sedimentary Rock (Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands) — sedimentary

Banded Sedimentary Rock

Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands

Weathered Sedimentary Rock with Liesegang Rings (Sandstone or Siltstone with Iron Oxide Banding) — sedimentary

Weathered Sedimentary Rock with Liesegang Rings

Sandstone or Siltstone with Iron Oxide Banding

Sandstone (Sedimentary Rock) (Arenite (SiO2 based)) — sedimentary

Sandstone (Sedimentary Rock)

Arenite (SiO2 based)

Chalk (Sedimentary Limestone) (Calcite (CaCO3)) — sedimentary

Chalk (Sedimentary Limestone)

Calcite (CaCO3)

Chert with Limestone (Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix) — sedimentary

Chert with Limestone

Microcrystalline Quartz (SiO2) in Calcium Carbonate (CaCO3) matrix

Conglomerate (Conglomerate rock) — sedimentary

Conglomerate

Conglomerate rock

Sandstone with Iron Oxide Coating (Arenite (SiO2 with Fe2O3 impurities)) — sedimentary

Sandstone with Iron Oxide Coating

Arenite (SiO2 with Fe2O3 impurities)

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

Sandstone (Ferruginous)

Arenite (with Goethite/Limonite cement)

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

Coquina / Fossiliferous Limestone

Fossiliferous Limestone / CaCO3

Fossiliferous Limestone with Brachiopod (Phylum Brachiopoda in Sedimentary Matrix (CaCO3)) — fossil

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Sandstone (Sedimentary Clastic Rock (Quartz-rich)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz-rich)

Selenite / Gypsum (Gypsum (CaSO4·2H2O)) — Mineral

Selenite / Gypsum

Gypsum (CaSO4·2H2O)

Rounded sedimentary pebble, likely mudstone or shale (Argillite/mudstone; predominantly compacted clay minerals with quartz and iron oxides) — sedimentary

Rounded sedimentary pebble, likely mudstone or shale

Argillite/mudstone; predominantly compacted clay minerals with quartz and iron oxides

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Red Sandstone (Clastic Sedimentary Rock) — sedimentary

Red Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Unidentified pale sedimentary rock, likely limestone (Calcite-rich limestone (CaCO₃), possibly fossiliferous or weathered micritic limestone) — sedimentary

Unidentified pale sedimentary rock, likely limestone

Calcite-rich limestone (CaCO₃), possibly fossiliferous or weathered micritic limestone

Banded chert or silicified sedimentary rock (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral bands) — sedimentary

Banded chert or silicified sedimentary rock

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral bands

Common Pebble / Sedimentary Rock Fragment (Lithified clastic sediment) — sedimentary

Common Pebble / Sedimentary Rock Fragment

Lithified clastic sediment