Rock Identifier

Category

Sedimentary Rock (Altered)

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

Learn about Sedimentary Rock (Altered) in the encyclopedia

Asphalt Rock

Rock Gypsum

Calc-Silicate Rock

Calc-Silicate Rock

Greenstone

Diabase

Metabasalt

Conglomerate

Breccia

Metarhyolite

Metagabbro

Ironstone

Limestone

Coal (Bituminous) (Sedimentary carbonaceous rock) — sedimentary

Coal (Bituminous)

Sedimentary carbonaceous rock

Siltstone or Mudstone (Argillaceous sedimentary rock) — sedimentary

Siltstone or Mudstone

Argillaceous sedimentary rock

Shale (Lutaceous sedimentary rock) — sedimentary

Shale

Lutaceous sedimentary rock

Orange Quartz (or Carnelian Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Orange Quartz (or Carnelian Chalcedony)

Silicon Dioxide (SiO2)

Yellow Agate (Banded Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Yellow Agate (Banded Chalcedony)

Silicon Dioxide (SiO2)

Banded Sedimentary Rock (Sedimentary rock with mineral veins/banding) — sedimentary

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Painted River Rock (Painted Quartzite or Smooth Siltstone) — sedimentary

Painted River Rock

Painted Quartzite or Smooth Siltstone

Mudstone (Argillite) — sedimentary

Mudstone

Argillite

Chert (Yellow/Tan Variety) (Chert (SiO2)) — sedimentary

Chert (Yellow/Tan Variety)

Chert (SiO2)

Agate (or Chalcedony) (SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz) — Mineral

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Wishing Stone (Quartz-veined Metamorphic/Sedimentary Rock) (Quartz Vein in Greywacke/Slate (SiO2 in host rock)) — metamorphic

Wishing Stone (Quartz-veined Metamorphic/Sedimentary Rock)

Quartz Vein in Greywacke/Slate (SiO2 in host rock)

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Banded Sedimentary Rock (Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands) — sedimentary

Banded Sedimentary Rock

Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands

Shale or Siltstone (Fine-grained siliciclastic sedimentary rock) — sedimentary

Shale or Siltstone

Fine-grained siliciclastic sedimentary rock

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

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Sedimentary Clastic Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz Arenite)

Sandstone (Clastic sedimentary rock (primarily quartz arenite)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily quartz arenite)

Sandstone (Sedimentary rock composed mainly of quartz sand) — sedimentary

Sandstone

Sedimentary rock composed mainly of quartz sand

Quartz Geode (likely within Limestone or Dolomite matrix) (Quartz (SiO₂)) — Mineral within a Sedimentary Rock

Quartz Geode (likely within Limestone or Dolomite matrix)

Quartz (SiO₂)

Mineral within a Sedimentary Rock

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Unakite (Unakite (Altered Granite composed of Orthoclase KAlSi3O8, Epidote Ca2(Al, Fe)3(SiO4)3(OH), and Quartz SiO2)) — metamorphic

Unakite

Unakite (Altered Granite composed of Orthoclase KAlSi3O8, Epidote Ca2(Al, Fe)3(SiO4)3(OH), and Quartz SiO2)

Banded Chert / Jasper (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Jasper

Silicon Dioxide (SiO2)

Bivalve Fossil (Clam Shell) (Class Bivalvia) — fossil

Bivalve Fossil (Clam Shell)

Class Bivalvia

Sandstone (Ferruginous) (Arenite with Iron Oxide (Limonite/Hematite) coating) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide (Limonite/Hematite) coating

Sandstone (Micaceous) (Clastic Sedimentary Rock (primarily SiO2 with Mica)) — sedimentary

Sandstone (Micaceous)

Clastic Sedimentary Rock (primarily SiO2 with Mica)

Chalcopyrite (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Petrified Wood (Silicified wood (primarily quartz, SiO2)) — fossil

Petrified Wood

Silicified wood (primarily quartz, SiO2)

Fossil Coral (Rugose Coral or Tabulate Coral (Phylum Cnidaria)) — fossil

Fossil Coral

Rugose Coral or Tabulate Coral (Phylum Cnidaria)

Fossilized Bark (Lepidodendron / Sigillaria fossil impression) — fossil

Fossilized Bark

Lepidodendron / Sigillaria fossil impression

Sandstone (Quartzite-rich) (Clastic sedimentary rock (SiO2 primary)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

Geode with Quartz and possibly Jasper/Hematite (Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides) — Mineral/Sedimentary Geode

Geode with Quartz and possibly Jasper/Hematite

Quartz (SiO2) and Chalcedony (cryptocrystalline SiO2), possibly stained by iron oxides

Mineral/Sedimentary Geode

Shale (Argillite / Shaly Mudstone) — sedimentary

Shale

Argillite / Shaly Mudstone

Sandstone (Clastic Sedimentary Rock (composed mostly of SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Sandstone (Wonderstone) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Wonderstone)

Clastic Sedimentary Rock (primarily SiO2)

Generic Pebble / Rock Fragment (Lithic fragment / Weathered rock) — sedimentary

Generic Pebble / Rock Fragment

Lithic fragment / Weathered rock

Red Sandstone (Clastic Sedimentary Rock) — sedimentary

Red Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Pyrite in Shale (Iron Disulfide (FeS2)) — mineral

Pyrite in Shale

Iron Disulfide (FeS2)