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

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Chert (Quartz) (Silicon dioxide (SiO2)) — sedimentary

Chert (Quartz)

Silicon dioxide (SiO2)

Sandstone Pebble (Sandstone (Quartz-rich Arenite)) — sedimentary

Sandstone Pebble

Sandstone (Quartz-rich Arenite)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Siltstone (Siltstone (composed of clastic quartz and feldspar grains)) — sedimentary

Siltstone

Siltstone (composed of clastic quartz and feldspar grains)

Siltstone (Siltstone (composed of microscopic quartz and clay minerals)) — sedimentary

Siltstone

Siltstone (composed of microscopic quartz and clay minerals)

Fossiliferous Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (Flint variety) (Chert (SiO2)) — sedimentary

Chert (Flint variety)

Chert (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Siltstone (Siltstone (primarily SiO2 with Al2O3)) — sedimentary

Siltstone

Siltstone (primarily SiO2 with Al2O3)

Greywacke (River Pebble) (Dirty Sandstone (SiO2 with lithic fragments)) — sedimentary

Greywacke (River Pebble)

Dirty Sandstone (SiO2 with lithic fragments)

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

Chert (Mudstone)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Fossiliferous Limestone (Crinoidal) (Bioclastic Limestone (predominantly CaCO3)) — sedimentary

Fossiliferous Limestone (Crinoidal)

Bioclastic Limestone (predominantly CaCO3)

Coquina (Biogenic Limestone (Calcite / CaCO3)) — sedimentary

Coquina

Biogenic Limestone (Calcite / CaCO3)

Limestone (Limestone (CaCO3)) — sedimentary

Limestone

Limestone (CaCO3)

Coquina Limestone (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Coquina Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Phyllite (Phyllite (Intermediate grade metamorphic rock)) — metamorphic

Phyllite

Phyllite (Intermediate grade metamorphic rock)

Dalmatian Stone (commonly called Dalmatian Jasper) (Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)) — igneous

Dalmatian Stone (commonly called Dalmatian Jasper)

Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)

Chert (Iron-rich or Slate-like variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-rich or Slate-like variant)

Silicon Dioxide (SiO2)

Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)) — mineral

Dendritic Agate

Silicon Dioxide with Manganese or Iron Oxide inclusions (SiO2 + Mn/Fe)

Sandstone (likely Arkosic or Lithic) (Clastic Sedimentary Rock (composed predominantly of sand-sized grains, 0.0625 to 2 mm)) — sedimentary

Sandstone (likely Arkosic or Lithic)

Clastic Sedimentary Rock (composed predominantly of sand-sized grains, 0.0625 to 2 mm)

Hag Stone (Perforated sedimentary rock (typically limestone, sandstone, or flint)) — sedimentary

Hag Stone

Perforated sedimentary rock (typically limestone, sandstone, or flint)

Petoskey Stone (Hexagonaria percarinata) — sedimentary

Petoskey Stone

Hexagonaria percarinata

Limestone with Lichen (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Lichen

Sedimentary Calcium Carbonate (CaCO3)

Sandstone with Manganese Dendrites/Oxide coatings (Arenite with Pyrolusite and Romanechite (MnO2)) — sedimentary

Sandstone with Manganese Dendrites/Oxide coatings

Arenite with Pyrolusite and Romanechite (MnO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Gneiss (Metamorphic Gneiss) — metamorphic

Gneiss

Metamorphic Gneiss

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

Sandstone

Arenite (composed primarily of SiO2)

Conglomerate (Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Zebra Jasper (Zebra Stone) (Tumbled Silicon Dioxide (SiO2) with impurities) — sedimentary

Zebra Jasper (Zebra Stone)

Tumbled Silicon Dioxide (SiO2) with impurities

Green Moss Agate (Silicon Dioxide (SiO2) with Mineral Inclusions) — sedimentary

Green Moss Agate

Silicon Dioxide (SiO2) with Mineral Inclusions

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

Ammonite Fossil (Iridiscent) (Ammonoidea (subclass)) — fossil

Ammonite Fossil (Iridiscent)

Ammonoidea (subclass)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Fossilized Shark Tooth (Chondrichthyes (Class)) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class)

Banded Onyx (Mexican Onyx / Travertine) (Calcite (CaCO3) - Banded Travertine) — sedimentary

Banded Onyx (Mexican Onyx / Travertine)

Calcite (CaCO3) - Banded Travertine

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)