Rock Identifier

Category

Sedimentary (Fossilized Organic Remain)

Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

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

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Sandstone Pebble (Arenite (primarily SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

Weathered Sandstone with Algae Growth (Arenite) — sedimentary

Weathered Sandstone with Algae Growth

Arenite

Sandstone (Ferruginous) (Arenite (SiO2 with Iron Oxide impurities)) — sedimentary

Sandstone (Ferruginous)

Arenite (SiO2 with Iron Oxide impurities)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Chert Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (containing Quartz) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (containing Quartz)

Microcrystalline Silica (SiO2)

Chert (Banded) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (Banded)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Chert (White/Gray variety) (Chert (SiO2)) — sedimentary

Chert (White/Gray variety)

Chert (SiO2)

Chert (Golden/Yellow Variety) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Golden/Yellow Variety)

Microcrystalline Silica (SiO2)

Sandstone (Sandstone (clastic sedimentary rock)) — Rock

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Chert (variations include Flint or Jasper) (Chert (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Chert (SiO2)

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

Chert (Flint variety)

Chert (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Sandstone (Quartzose Sandstone) (Clastic Terrigenous Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Terrigenous Sedimentary Rock (primarily SiO2)

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Blue Kyanite (Kyanite (Al2SiO5)) — metamorphic

Blue Kyanite

Kyanite (Al2SiO5)

Bauxite (Concretionary) (Bauxite (Al(OH)3, AlO(OH))) — sedimentary

Bauxite (Concretionary)

Bauxite (Al(OH)3, AlO(OH))

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Conglomerate (Conglomerate (SiO2 matrix with various inclusions)) — sedimentary

Conglomerate

Conglomerate (SiO2 matrix with various inclusions)

Sandstone (Quartzite Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Red Siltstone (Siltstone (primarily quartz and feldspar sized 0.0039 to 0.0625 mm)) — sedimentary

Red Siltstone

Siltstone (primarily quartz and feldspar sized 0.0039 to 0.0625 mm)

Sandstone (Ferruginous) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)) — sedimentary

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone (with Liesegang rings or Oxidation) (Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)) — sedimentary

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

Ammonite Fossil (Ammonitida (Extinct subclass of Cephalopoda)) — sedimentary

Ammonite Fossil

Ammonitida (Extinct subclass of Cephalopoda)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Sandstone (Yellow/Siltstone variant) (Arenite (SiO2 primarily)) — sedimentary

Sandstone (Yellow/Siltstone variant)

Arenite (SiO2 primarily)

Sandstone (likely Arkose) (Arenite (Feldspathic Sandstone / Arkose)) — sedimentary

Sandstone (likely Arkose)

Arenite (Feldspathic Sandstone / Arkose)

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

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Sandstone (Arenite (predominantly SiO2)) — sedimentary

Sandstone

Arenite (predominantly SiO2)