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

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Sandstone (Sedimentary Clastic Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz arenite)

Sandstone (Clastic sedimentary rock (Quartz arenite)) — sedimentary

Sandstone

Clastic sedimentary rock (Quartz arenite)

Sandstone (Arenite (SiO2 based sedimentary rock)) — sedimentary

Sandstone

Arenite (SiO2 based sedimentary rock)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (likely Arkose or Quartz Sandstone) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (likely Arkose or Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

Fossilized Shell or Coral Fragment in Matrix (Invertebrate Fossil in Sedimentary Rock) — fossil

Fossilized Shell or Coral Fragment in Matrix

Invertebrate Fossil in Sedimentary Rock

Stromatolite (Biogenic sedimentary rock / Stromatolite) — sedimentary

Stromatolite

Biogenic sedimentary rock / Stromatolite

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Sandstone (Weathered Pebble) (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone (Weathered Pebble)

Sedimentary Rock (Quartz arenite)

Sandstone (Sandstone (Siliciclastic Sedimentary Rock)) — sedimentary

Sandstone

Sandstone (Siliciclastic Sedimentary Rock)

Sandstone (with Iron Staining) (Arenite (Siliclastic sedimentary rock)) — sedimentary

Sandstone (with Iron Staining)

Arenite (Siliclastic sedimentary rock)

Siltstone (Siltstone (clastic sedimentary rock)) — sedimentary

Siltstone

Siltstone (clastic sedimentary rock)

Tumbled jasper (Microcrystalline quartz (SiO₂), colored by iron oxides and other impurities) — mineral

Tumbled jasper

Microcrystalline quartz (SiO₂), colored by iron oxides and other impurities

Chert or siliceous limestone fragments (Microcrystalline quartz (chert) and/or calcarenite; exact identification is uncertain from the photograph) — sedimentary

Chert or siliceous limestone fragments

Microcrystalline quartz (chert) and/or calcarenite; exact identification is uncertain from the photograph

Tumbled red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — mineral

Tumbled red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Orange calcite pieces on blue calcite or aragonite matrix (Calcite, CaCO₃; blue coloration likely trace-element-bearing calcite (possibly aragonite)) — mineral

Orange calcite pieces on blue calcite or aragonite matrix

Calcite, CaCO₃; blue coloration likely trace-element-bearing calcite (possibly aragonite)

Hematite (Hematite (Fe2O3)) — mineral

Hematite

Hematite (Fe2O3)

Geode (unopened) (Silica-filled Concretion (SiO2)) — sedimentary

Geode (unopened)

Silica-filled Concretion (SiO2)

Jasper (Iron-rich Chert) (Silicon Dioxide (SiO2) with impurities of Hematite or Goethite) — sedimentary

Jasper (Iron-rich Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Satin Spar (Gypsum) (Hydrous Calcium Sulfate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum)

Hydrous Calcium Sulfate (CaSO4·2H2O)

Chert (specifically Silex or Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Silex or Flint)

Microcrystalline Quartz (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Bituminous coal (Coal, predominantly carbon with macerals and minor clay/pyrite minerals) — sedimentary

Bituminous coal

Coal, predominantly carbon with macerals and minor clay/pyrite minerals

Rounded weathered pebble (Likely fine-grained sandstone, siltstone, or weathered volcanic rock; exact identification is uncertain from the image) — sedimentary

Rounded weathered pebble

Likely fine-grained sandstone, siltstone, or weathered volcanic rock; exact identification is uncertain from the image

Shiva Lingam (Cryptocrystalline Quartz (Jasperiod Siltstone)) — sedimentary

Shiva Lingam

Cryptocrystalline Quartz (Jasperiod Siltstone)

Quartz-lined geode (Silica geode; predominantly microcrystalline quartz (SiO₂), possibly chalcedony) — mineral

Quartz-lined geode

Silica geode; predominantly microcrystalline quartz (SiO₂), possibly chalcedony

Yellow calcite fragment (Calcite (CaCO₃), likely honey/yellow calcite) — mineral

Yellow calcite fragment

Calcite (CaCO₃), likely honey/yellow calcite

Tumbled quartz (likely milky quartz) (Quartz — silicon dioxide, SiO₂) — mineral

Tumbled quartz (likely milky quartz)

Quartz — silicon dioxide, SiO₂

Pyrite cluster (iron pyrite) (Pyrite, FeS₂) — mineral

Pyrite cluster (iron pyrite)

Pyrite, FeS₂

Chert (often called Flint when found in chalk/limestone) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when found in chalk/limestone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Brown Jasper (Tiger Jasper) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Brown Jasper (Tiger Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper (possibly Agatized Jasper) (Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)) — sedimentary

Red Jasper (possibly Agatized Jasper)

Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Shale (Laminated Mudstone) — sedimentary

Shale

Laminated Mudstone

Sandstone (River Cobble) (Sandstone (primarily composed of silica, SiO2)) — sedimentary

Sandstone (River Cobble)

Sandstone (primarily composed of silica, SiO2)

Sandstone (Clastic sedimentary rock (Quartz arenite)) — sedimentary

Sandstone

Clastic sedimentary rock (Quartz arenite)

Banded Sandstone / Siltstone (Sedimentary Rock (Quartzose Sandstone / Siltstone)) — sedimentary

Banded Sandstone / Siltstone

Sedimentary Rock (Quartzose Sandstone / Siltstone)