Rock Identifier

Category

Organic (Sedimentary Context)

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

Learn about Organic (Sedimentary Context) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Oil Shale

Chert (Jasper variation) (Chert (SiO2)) — sedimentary

Chert (Jasper variation)

Chert (SiO2)

Petrified Wood (Silicified wood (Quartz/Chalcedony/SiO2)) — sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony/SiO2)

Chert (Iron-Stained) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-Stained)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Anthracite Coal (Anthracite (Carbon-based organic sedimentary/metamorphic rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Coal (Anthracite) (Anthracite (Carbon-based organic sedimentary/metamorphic rock)) — metamorphic

Coal (Anthracite)

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Fossil Shark Tooth (Chondrichthyes (Class)) — fossil

Fossil Shark Tooth

Chondrichthyes (Class)

Shale (Fissile mudstone (primarily clay minerals and silt-sized quartz)) — sedimentary

Shale

Fissile mudstone (primarily clay minerals and silt-sized quartz)

Fossil Coral (Rugose Coral Fragment) (Rugosa (extinct order of solitary and colonial corals)) — sedimentary

Fossil Coral (Rugose Coral Fragment)

Rugosa (extinct order of solitary and colonial corals)

Jasper (Green Jasper / Chert) (Silicon Dioxide (SiO2 with inclusions)) — mineral

Jasper (Green Jasper / Chert)

Silicon Dioxide (SiO2 with inclusions)

Pink Opal (Hydrated Silicon Dioxide (SiO2 · nH2O)) — mineraloid

Pink Opal

Hydrated Silicon Dioxide (SiO2 · nH2O)

Petrified Wood (Silicified Wood (SiO2)) — metamorphic

Petrified Wood

Silicified Wood (SiO2)

Pyrite-bearing Schist (Pyritic Quartz-Mica Schist with FeS2 inclusion) — metamorphic

Pyrite-bearing Schist

Pyritic Quartz-Mica Schist with FeS2 inclusion

Zebra Stone (Banded Chert or Limestone) (Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions) — sedimentary

Zebra Stone (Banded Chert or Limestone)

Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Yellow Chert (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Yellow Chert

Chert (Cryptocrystalline Quartz, SiO2)

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

Chert (River Stone)

Microcrystalline Quartz (SiO2)

Chert / Chalcedony (Agatized) (Silicon dioxide (SiO2)) — sedimentary

Chert / Chalcedony (Agatized)

Silicon dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Sandstone (Quartz-rich Arenite / SiO2)) — sedimentary

Sandstone

Sandstone (Quartz-rich Arenite / SiO2)

Sandstone (with Moss/Lichen Growth) (Sandstone (Quartz Arenite / Lithic Arenite)) — sedimentary

Sandstone (with Moss/Lichen Growth)

Sandstone (Quartz Arenite / Lithic Arenite)

Chert (Iron-stained) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Iron-stained)

Silicon Dioxide (SiO2)

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

Banded Chert

Chert (Microcrystalline Quartz, SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Septarian Nodule (Septarian Concretion (CaCO3 + Hydrated SiO2)) — sedimentary

Septarian Nodule

Septarian Concretion (CaCO3 + Hydrated SiO2)

Vuggy Limestone (Calcium Carbonate (CaCO3) with Quartz/Calcite inclusions) — sedimentary

Vuggy Limestone

Calcium Carbonate (CaCO3) with Quartz/Calcite inclusions

Chert (River Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (River Pebble)

Silicon Dioxide (SiO2)

Chert (Arrowhead Fragment) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Arrowhead Fragment)

Silicon Dioxide (SiO2)

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

Chert / River Stone

Microcrystalline Quartz (SiO2)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (Flint) (Chert (Microcrystalline Silica, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Silica, SiO2)

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Yellow Jasper variant) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (specifically a weathered Chert nodule or fragment) (Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically a weathered Chert nodule or fragment)

Chert; Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossiliferous Limestone (CaCO3 (principally Calcite or Aragonite)) — sedimentary

Fossiliferous Limestone

CaCO3 (principally Calcite or Aragonite)

Coral Fossil (Scleractinia) (Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)) — sedimentary

Coral Fossil (Scleractinia)

Scleractinia (Order), primarily CaCO3 (Aragonite or Calcite)

River Stone (Chert/Siltstone) (Cryptocrystalline Quartz (SiO2) with trace impurities) — sedimentary

River Stone (Chert/Siltstone)

Cryptocrystalline Quartz (SiO2) with trace impurities

Fossil Shark Tooth (Carcharodon or Carcharias fossil (Vertebrate Fossil)) — sedimentary

Fossil Shark Tooth

Carcharodon or Carcharias fossil (Vertebrate Fossil)

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

Chert (Beach Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Beach Pebble)

Silicon Dioxide (SiO2)

Chert (Iron-stained) (Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Iron-stained)

Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)

Yellow Chert (Jasper) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Yellow Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

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

Chert (often called Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (often referred to as Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (often referred to as Flint)

Chert (Microcrystalline Quartz, SiO2)