Rock Identifier

Category

Rock (Likely Sedimentary)

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

Learn about Rock (Likely Sedimentary) in the encyclopedia

Asphalt Rock

Rock Gypsum

Conglomerate

Breccia

Ironstone

Limestone

Claystone

Phosphorite

Chert

Coal

Pisolite

Mudstone

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

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Quartz Vein in Sandstone (Sandstone with Hydrothermal Quartz (SiO2)) — sedimentary

Quartz Vein in Sandstone

Sandstone with Hydrothermal Quartz (SiO2)

Stromatolite (Biogenic sedimentary rock / Stromatolite) — sedimentary

Stromatolite

Biogenic sedimentary rock / Stromatolite

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

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)

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Sandstone (Sedimentary rock composed of silicate grains)) — sedimentary

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Shale

Shale (fine-grained clastic sedimentary rock)

Brachiopod Fossil in Matrix (Phylum Brachiopoda) — fossil

Brachiopod Fossil in Matrix

Phylum Brachiopoda

Seashell Fossil (Mollusca (Bivalvia)) — fossil

Seashell Fossil

Mollusca (Bivalvia)

Fossilized Coral (Cnidaria (Hexacorallia)) — fossil

Fossilized Coral

Cnidaria (Hexacorallia)

Fossiliferous Rock (Invertebrate Fossil in Matrix) (Fossiliferous limestone or shaly matrix containing skeletal fossil remains) — fossil

Fossiliferous Rock (Invertebrate Fossil in Matrix)

Fossiliferous limestone or shaly matrix containing skeletal fossil remains

Fossil Shell (Phylum Mollusca (Gastropod fossil)) — fossil

Fossil Shell

Phylum Mollusca (Gastropod fossil)

Fossilized Rugose Coral in Limestone (Order Rugosa in Sedimentary Matrix (CaCO3)) — fossil

Fossilized Rugose Coral in Limestone

Order Rugosa in Sedimentary Matrix (CaCO3)

Crinoid Stem Fossil (Class Crinoidea (Sea Lilies)) — sedimentary

Crinoid Stem Fossil

Class Crinoidea (Sea Lilies)

Quartz (Chert/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Concretion in Shale (Siltstone/Shale with Siderite or Calcareous concretions) — sedimentary

Concretion in Shale

Siltstone/Shale with Siderite or Calcareous concretions

Chert Breccia (Brecciated Chert) — sedimentary

Chert Breccia

Brecciated Chert

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

White quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Polished carnelian/chalcedony pebble (Microcrystalline quartz (SiO₂), likely iron-stained chalcedony) — gemstone

Polished carnelian/chalcedony pebble

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony

Gneiss (Pebble) (Gneiss) — metamorphic

Gneiss (Pebble)

Gneiss

Quartzite (Quartzite (containing SiO2)) — metamorphic

Quartzite

Quartzite (containing SiO2)

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper) (FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)) — mineral

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)

FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)

Likely vesicular basalt (scoria) (Basaltic volcanic rock, chiefly plagioclase, pyroxene, and possibly olivine) — igneous

Likely vesicular basalt (scoria)

Basaltic volcanic rock, chiefly plagioclase, pyroxene, and possibly olivine

Limestone (Carbonate rock (CaCO3)) — sedimentary

Limestone

Carbonate rock (CaCO3)

Concretion (Various mineral compositions, typically carbonate or iron oxide cemented sediment) — Sedimentary

Concretion

Various mineral compositions, typically carbonate or iron oxide cemented sediment

Likely biotite schist or mica-rich metamorphic rock (Mica schist, predominantly biotite mica with quartz and feldspar) — metamorphic

Likely biotite schist or mica-rich metamorphic rock

Mica schist, predominantly biotite mica with quartz and feldspar

Sandstone (Sedimentary Rock (Quartz/Feldspar grains cemented together)) — sedimentary

Sandstone

Sedimentary Rock (Quartz/Feldspar grains cemented together)

Chert / Quartzite (Silicon Dioxide (SiO2)) — sedimentary

Chert / Quartzite

Silicon Dioxide (SiO2)

Chert (Chert Nodule with Cortex) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chert Nodule with Cortex)

Microcrystalline Quartz (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Limonite stained Sandstone (Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)) — sedimentary

Limonite stained Sandstone

Sedimentary rock with Goethite/Limonite (FeO(OH)·nH2O)

Sandstone Pebble (Sandstone (Quartzose/Feldspathic Sandstone)) — sedimentary

Sandstone Pebble

Sandstone (Quartzose/Feldspathic Sandstone)

Fossilized Trilobite or Mollusk Fragment (Phylum Arthropoda / Mollusca fossil in sedimentary matrix) — fossil

Fossilized Trilobite or Mollusk Fragment

Phylum Arthropoda / Mollusca fossil in sedimentary matrix

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

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)