Rock Identifier

Category

Sedimentary Or Metamorphic (Base Substrate)

Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.

Learn about Sedimentary Or Metamorphic (Base Substrate) in the encyclopedia

Sard

White Obsidian

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Metabasalt

Eulysite

Breccia

Hornfels

Ironstone

Anthracite

Metaquartzite

Slate

Breccia (Clastic Breccia (SiO2/CaCO3 dominated)) — sedimentary

Breccia

Clastic Breccia (SiO2/CaCO3 dominated)

Bituminous Coal (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Sedimentary Breccia (Clastic Breccia (CaCO3/SiO2 matrix)) — sedimentary

Sedimentary Breccia

Clastic Breccia (CaCO3/SiO2 matrix)

Sandstone (Arenite (SiO2 based typically)) — sedimentary

Sandstone

Arenite (SiO2 based typically)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Quartzite (Metamorphosed Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Sandstone (SiO2)

Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Druzy Quartz on Ironstone (Silicon Dioxide (SiO2) on Limonitic Ironstone) — mineral

Druzy Quartz on Ironstone

Silicon Dioxide (SiO2) on Limonitic Ironstone

Sandstone (likely Graywacke or Arkose variant) (Clastic Sedimentary Rock (SiO2 dominated)) — sedimentary

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 dominated)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Muscovite Mica (KAl2(AlSi3O10)(F,OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Mica Schist (Muscovite/Biotite Schist) — metamorphic

Mica Schist

Muscovite/Biotite Schist

Crushed Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Fossiliferous Limestone (Bioclastic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Bioclastic Limestone (CaCO3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Concrete fragment with Aggregate (Anthropogenic Concrete with Calcarious and Siliceous Aggregate) — sedimentary (anthropogenic/man-made)

Concrete fragment with Aggregate

Anthropogenic Concrete with Calcarious and Siliceous Aggregate

sedimentary (anthropogenic/man-made)

Fossiliferous Limestone (Biogenic Sedimentary Rock (primarily CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock (primarily CaCO3)

River Pebble (likely Quartzite or Chert) (Sedimentary Clast (Silicon Dioxide dominant)) — sedimentary

River Pebble (likely Quartzite or Chert)

Sedimentary Clast (Silicon Dioxide dominant)

Fuchsite (Green Muscovite) (K(Al,Cr)2(AlSi3O10)(OH)2) — Mineral

Fuchsite (Green Muscovite)

K(Al,Cr)2(AlSi3O10)(OH)2

Fossilized Gastropod Internal Mold (Steinkern (Mollusca: Gastropoda)) — sedimentary

Fossilized Gastropod Internal Mold

Steinkern (Mollusca: Gastropoda)

Mica Schist (Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)) — metamorphic

Mica Schist

Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)

Sandstone (Arenite (SiO2 based with cement)) — sedimentary

Sandstone

Arenite (SiO2 based with cement)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Pyrite Nodules / Weathered Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite Nodules / Weathered Pyrite

Iron Sulfide (FeS2)

Sandstone/Quartzite (Sedimentary Rock (composed mainly of SiO2)) — sedimentary

Sandstone/Quartzite

Sedimentary Rock (composed mainly of SiO2)

Sandstone (with minor quartz and possible clay components) (Clastic Sedimentary Rock (SiO2 dominated)) — sedimentary

Sandstone (with minor quartz and possible clay components)

Clastic Sedimentary Rock (SiO2 dominated)

Quartz (Druzy / Goldstone Gemstone Cabochon) (Silicon Dioxide (SiO2)) — gemstone

Quartz (Druzy / Goldstone Gemstone Cabochon)

Silicon Dioxide (SiO2)

Sandstone (likely Greywacke variant) (Arenite) — sedimentary

Sandstone (likely Greywacke variant)

Arenite

Laterite (Laterite (no specific mineral formula as it's a rock type)) — Sedimentary

Laterite

Laterite (no specific mineral formula as it's a rock type)

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

Sandstone

Arenite (primarily composed of SiO2)

Quartz-Veined Sandstone (Quartz-veined Arenite) — sedimentary

Quartz-Veined Sandstone

Quartz-veined Arenite

Sandstone (Arenite (compositionally various, primarily SiO2)) — sedimentary

Sandstone

Arenite (compositionally various, primarily SiO2)

Basalt (potential Glacial Erratic) (Extrusive Mafic Volcanic Rock (Basalt)) — igneous

Basalt (potential Glacial Erratic)

Extrusive Mafic Volcanic Rock (Basalt)

Chert (Arrowhead/Projectile Point) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead/Projectile Point)

Microcrystalline Quartz (SiO2)

Sandstone (likely Graywacke or Arkose) (Arenite) — sedimentary

Sandstone (likely Graywacke or Arkose)

Arenite