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

Limestone (Calcium carbonate rock (CaCO3)) — sedimentary

Limestone

Calcium carbonate rock (CaCO3)

Mookaite Jasper (Silicified Radiolarite (SiO2)) — sedimentary

Mookaite Jasper

Silicified Radiolarite (SiO2)

Rough Precious Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Rough Precious Opal

Hydrated Silica (SiO2·nH2O)

Quartz Pebble (Chert/Chalcedony Gravel) (Microcrystalline Quartz (SiO2)) — sedimentary

Quartz Pebble (Chert/Chalcedony Gravel)

Microcrystalline Quartz (SiO2)

Ironstone Concretion (Ferruginous Sandstone / Hematite-rich Concretion) — sedimentary

Ironstone Concretion

Ferruginous Sandstone / Hematite-rich Concretion

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

Chert (Nodular Chert)

Microcrystalline Quartz (SiO2)

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Chert (with inclusions) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (with inclusions)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Field Stone/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Field Stone/Jasper variety)

Microcrystalline Quartz (SiO2)

Gray Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Gray Limestone

Calcium Carbonate (CaCO3)

Coquina (Bioclastic Limestone (composed of CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (composed of CaCO3)

Chert (also known as Flint or Common Chalcedony) (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (also known as Flint or Common Chalcedony)

Cryptocrystalline Silica (SiO2)

Coquina (Bioclastic Limestone (Coquina)) — sedimentary

Coquina

Bioclastic Limestone (Coquina)

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

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Ferruginous Sandstone (Ironstone) (Ferruginous Sandstone / Limonite-cemented Quartz Sandstone) — sedimentary

Ferruginous Sandstone (Ironstone)

Ferruginous Sandstone / Limonite-cemented Quartz Sandstone

Garnet Schist (Almandine-Mica Schist) — metamorphic

Garnet Schist

Almandine-Mica Schist

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Siltstone (Siltstone (primarily composed of silica and clay minerals)) — sedimentary

Siltstone

Siltstone (primarily composed of silica and clay minerals)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 cement)

Ferruginous Sandstone (Ironstone Nodules) (Ferruginous Quartz-Arenite (with Goethite/Hematite cement)) — sedimentary

Ferruginous Sandstone (Ironstone Nodules)

Ferruginous Quartz-Arenite (with Goethite/Hematite cement)

Conglomerate (Conglomerate) — sedimentary

Conglomerate

Conglomerate

Gneiss (Foliated Metamorphic Rock) — metamorphic

Gneiss

Foliated Metamorphic Rock

Schist (Metamorphic Rock (Schist)) — metamorphic

Schist

Metamorphic Rock (Schist)

Quartzite (Metamorphic rock (SiO2)) — metamorphic

Quartzite

Metamorphic rock (SiO2)

Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Gneiss

Gneiss (Metamorphic rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Black Onyx (Chalcedony) (Silicon Dioxide (SiO₂)) — mineral

Banded Black Onyx (Chalcedony)

Silicon Dioxide (SiO₂)

Jasper (specifically Bloodstone or Heliotrope variety) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary (chemically precipitated)

Jasper (specifically Bloodstone or Heliotrope variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary (chemically precipitated)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone (Sedimentary Rock (Primarily Calcium Carbonate, CaCO3)) — sedimentary

Limestone

Sedimentary Rock (Primarily Calcium Carbonate, CaCO3)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Sandstone Concretion (Clastic Sedimentary Rock - Quartz Arenite / Sandstone) — sedimentary

Sandstone Concretion

Clastic Sedimentary Rock - Quartz Arenite / Sandstone

Shale (possibly Carbonaceous or Oil Shale) (Argillaceous Sedimentary Rock) — sedimentary

Shale (possibly Carbonaceous or Oil Shale)

Argillaceous Sedimentary Rock

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — mineral

Blue Kyanite

Kyanite (Al2SiO5)

Anthracite Coal (Anthracite (Metamorphic Coal)) — sedimentary

Anthracite Coal

Anthracite (Metamorphic Coal)

Chert / Flint Pebble (Microcrystalline quartz (SiO2)) — sedimentary

Chert / Flint Pebble

Microcrystalline quartz (SiO2)

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

Chert / Microcrystalline Quartz

Chert (SiO2)

Slate (Metamorphic Pelitic Rock) — metamorphic

Slate

Metamorphic Pelitic Rock

Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Metamorphic Rock)