Rock Identifier

Category

Sedimentary (Fossilized Organic Matter)

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

Learn about Sedimentary (Fossilized Organic Matter) in the encyclopedia

Sapropel

Petrified Wood

Amber

Bituminous Shale

Bituminous Shale

Oil Shale

Matte Obsidian

Black Shale

Conglomerate

Jet

Peat

Quartzite Sandstone

Quartzite Sandstone

Breccia

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Cryptocrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Chert (Yellow Jasper variant) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline quartz (SiO2)

Red Jasper (Quartz (Silicon Dioxide) with Hematite inclusions, SiO2) — mineral

Red Jasper

Quartz (Silicon Dioxide) with Hematite inclusions, SiO2

Chert (and Flint) (Silicon dioxide (SiO2) - Microcrystalline or Cryptocrystalline Quartz) — sedimentary

Chert (and Flint)

Silicon dioxide (SiO2) - Microcrystalline or Cryptocrystalline Quartz

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

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (varietal: Flint/Jasper mix) (Hydrous Silica (SiO2)) — sedimentary

Chert (varietal: Flint/Jasper mix)

Hydrous Silica (SiO2)

Chert / Flint Nodules (Chert (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Chert / Flint Nodules

Chert (Cryptocrystalline variety of Quartz, SiO2)

Chert (Yellow Jasper/Agatized Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper/Agatized Chert)

Microcrystalline Quartz (SiO2)

Fossiliferous Chert (with Fossil Shells) (Silicon Dioxide (SiO2) with biogenic inclusions) — sedimentary

Fossiliferous Chert (with Fossil Shells)

Silicon Dioxide (SiO2) with biogenic inclusions

Bituminous Coal (Organic-rich sedimentary rock (Complex hydrocarbons)) — sedimentary

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Fossilized Ray Barb (Stinger) Fragment (Myliobatiformes indet. (Fossil stingray spine)) — fossil

Fossilized Ray Barb (Stinger) Fragment

Myliobatiformes indet. (Fossil stingray spine)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Chert (Green Jasper) (Microcrystalline Quartz (SiO2) with iron silicate inclusions) — sedimentary

Chert (Green Jasper)

Microcrystalline Quartz (SiO2) with iron silicate inclusions

Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert

Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Sandstone with Quartz Crystal Infill (Quartz-cemented quartz arenite) — sedimentary

Sandstone with Quartz Crystal Infill

Quartz-cemented quartz arenite

Chert (often called Jasper or River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Jasper or River Pebble)

Microcrystalline Quartz (SiO2)

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

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Shale (Laminated Mudrock with plant fossils) — sedimentary

Fossiliferous Shale

Laminated Mudrock with plant fossils

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Bumblebee Jasper (Fibrous Calcite and Quartz with Volcanic Matter (CaCO3 / SiO2)) — mineral

Bumblebee Jasper

Fibrous Calcite and Quartz with Volcanic Matter (CaCO3 / SiO2)

Fossilized bivalve or brachiopod shell (Indeterminate calcitic shell fossil; likely Bivalvia or Brachiopoda) — fossil

Fossilized bivalve or brachiopod shell

Indeterminate calcitic shell fossil; likely Bivalvia or Brachiopoda

Fossilized Coral (Rugose or Tabulate Coral) (Phylum Cnidaria, Class Anthozoa (silicified or calcified coral fossil)) — fossil

Fossilized Coral (Rugose or Tabulate Coral)

Phylum Cnidaria, Class Anthozoa (silicified or calcified coral fossil)

Fossilized coral or porous marine limestone (Likely fossil coral (Scleractinia), composed mainly of calcite/aragonite (CaCO₃)) — fossil

Fossilized coral or porous marine limestone

Likely fossil coral (Scleractinia), composed mainly of calcite/aragonite (CaCO₃)

Fossilized oyster shell in limestone (Bivalvia fossil; chiefly calcite (CaCO₃)) — fossil

Fossilized oyster shell in limestone

Bivalvia fossil; chiefly calcite (CaCO₃)

Fossilized Coral (Petoskey Stone / Hexagonaria) (Hexagonaria percarinata / Rugosa coral) — fossil

Fossilized Coral (Petoskey Stone / Hexagonaria)

Hexagonaria percarinata / Rugosa coral

Fossilized Crinoid Stem in Pebble (Crinoidea (Class) preserved in calcite/matrix) — fossil

Fossilized Crinoid Stem in Pebble

Crinoidea (Class) preserved in calcite/matrix

Fossilized Crinoid Stem in Matrix (Crinoid (Class: Crinoidea)) — fossil

Fossilized Crinoid Stem in Matrix

Crinoid (Class: Crinoidea)

Grey Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Grey Limestone

Calcium Carbonate (CaCO3)

Limestone (with weathering rind) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with weathering rind)

Calcium Carbonate (CaCO3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint Pebble) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Pebble)

Cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Microcrystalline Quartz (SiO2)