Rock Identifier

Category

Sedimentary (Biogenic Sediment Or Biological Remain)

Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Biogenic Sediment Or Biological Remain) in the encyclopedia

Sapropel

Claystone

Phosphorite

Diatomite

Turbidite

Quartzite Sandstone

Quartzite Sandstone

Conglomerate

Ironstone

Breccia

Tripolite

Bituminous Shale

Bituminous Shale

Kambaba Jasper

Hag Stone (Odin Stone / Adder Stone) (Perforated Pebble (commonly Chert, Mudstone, or Limestone)) — sedimentary

Hag Stone (Odin Stone / Adder Stone)

Perforated Pebble (commonly Chert, Mudstone, or Limestone)

Chert with Quartz Vein (Microcrystalline Quartz (SiO2)) — sedimentary

Chert with Quartz Vein

Microcrystalline Quartz (SiO2)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Banded Iron Formation (BIF) (Banded Iron Formation (BIF), SiO2 / Fe2O3) — sedimentary

Banded Iron Formation (BIF)

Banded Iron Formation (BIF), SiO2 / Fe2O3

Fossiliferous limestone (Bioclastic limestone, composed chiefly of calcite (CaCO₃)) — sedimentary

Fossiliferous limestone

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

Dinosaur Bone (Gembone) (Petrified Dinosaur Bone (Apatite/Silica replacement)) — sedimentary

Dinosaur Bone (Gembone)

Petrified Dinosaur Bone (Apatite/Silica replacement)

Porous limestone (possibly fossiliferous) (Calcite-rich limestone, chiefly calcium carbonate (CaCO₃)) — sedimentary

Porous limestone (possibly fossiliferous)

Calcite-rich limestone, chiefly calcium carbonate (CaCO₃)

Fossilized Bone (Petrified Bone) (Permineralized Vertebrate Remains) — sedimentary

Fossilized Bone (Petrified Bone)

Permineralized Vertebrate Remains

Limestone (Concretionary or Tufa) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Concretionary or Tufa)

Calcium Carbonate (CaCO3)

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

Chert (Flint variety)

Chert (SiO2)

Chert (Yellow Jasper variant) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Fossiliferous Shale Matrix (Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments) — sedimentary

Fossiliferous Shale Matrix

Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments

Chert with Iron Oxide Staining (Microcrystalline Quartz (SiO2) with Limonite/Goethite staining) — sedimentary

Chert with Iron Oxide Staining

Microcrystalline Quartz (SiO2) with Limonite/Goethite staining

Sandstone with Lichen (Arenite (SiO2 based) with biological weathering) — sedimentary

Sandstone with Lichen

Arenite (SiO2 based) with biological weathering

Limestone with Lichen (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Lichen

Sedimentary Calcium Carbonate (CaCO3)

Possible fossil-bearing pebble (Unidentified fine-grained sedimentary rock; the small orange feature may be a fossil or mineral inclusion) — sedimentary

Possible fossil-bearing pebble

Unidentified fine-grained sedimentary rock; the small orange feature may be a fossil or mineral inclusion

Chert Nodules with Iron Staining (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodules with Iron Staining

Microcrystalline Quartz (SiO2)

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

Chert (Weathered)

Chert (Microcrystalline Quartz, SiO2)

Piddock bored rock (likely Mudstone or Shale) (Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock) — sedimentary

Piddock bored rock (likely Mudstone or Shale)

Ichnofossil (Gastrochaenolites borings) in Fine-grained Sedimentary Rock

Chalky limestone (Micritic calcite (CaCO₃), likely biogenic limestone/chalk) — sedimentary

Chalky limestone

Micritic calcite (CaCO₃), likely biogenic limestone/chalk

Layered limestone, likely stromatolitic or microbial limestone (Limestone; predominantly calcite (CaCO₃), possibly biogenic micrite) — sedimentary

Layered limestone, likely stromatolitic or microbial limestone

Limestone; predominantly calcite (CaCO₃), possibly biogenic micrite

Fossiliferous Limestone (Pink/Red) (Calcium Carbonate (CaCO3) with Bioclasts) — sedimentary

Fossiliferous Limestone (Pink/Red)

Calcium Carbonate (CaCO3) with Bioclasts

Limestone (specifically Marl or Chalk) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (specifically Marl or Chalk)

Calcium Carbonate (CaCO3)

Flint (Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)) — Mineral

Flint

Chert (a form of cryptocrystalline quartz, chemical formula SiO₂)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

Rough Amber (likely Copal or immature Amber) (Organic gemstone / Succinite (if Baltic)) — mineral

Rough Amber (likely Copal or immature Amber)

Organic gemstone / Succinite (if Baltic)

Fossilized Gastropod Internal Mold (Steinkern (Mollusca: Gastropoda)) — sedimentary

Fossilized Gastropod Internal Mold

Steinkern (Mollusca: Gastropoda)

Fossiliferous limestone, likely coral or shell-rich limestone (Biogenic calcite (CaCO₃), commonly limestone containing fossil coral or mollusks) — fossil

Fossiliferous limestone, likely coral or shell-rich limestone

Biogenic calcite (CaCO₃), commonly limestone containing fossil coral or mollusks

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

Chert Nodule (Flint)

Silicon Dioxide (SiO2)

Sandstone with Algae Growth (Arenite with Chlorophyta/Lichen) — sedimentary

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

Banded Iron Formation (BIF) / Chert (Banded Iron Formation (SiO2 with Fe2O3 / Fe3O4)) — sedimentary

Banded Iron Formation (BIF) / Chert

Banded Iron Formation (SiO2 with Fe2O3 / Fe3O4)

Hag Stone (Sandstone with Boreholes) (Bored Sandstone (Sedimentary rock with lithophaga-style borings)) — sedimentary

Hag Stone (Sandstone with Boreholes)

Bored Sandstone (Sedimentary rock with lithophaga-style borings)

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

Chert (Jasper/Brown Chert)

Silicon Dioxide (SiO2)

Rounded fossil fragment, possibly fossiliferous limestone (Unidentified carbonate fossil or fossil-bearing limestone; exact fossil cannot be determined from the photograph) — fossil

Rounded fossil fragment, possibly fossiliferous limestone

Unidentified carbonate fossil or fossil-bearing limestone; exact fossil cannot be determined from the photograph

Amber (Succinate (Organic Fossilized Resin)) — mineraloid

Amber

Succinate (Organic Fossilized Resin)

Limestone with Calcite Veins (Calcite-veined Argillaceous Limestone) — sedimentary

Limestone with Calcite Veins

Calcite-veined Argillaceous Limestone

Shell fossil or shell fragment (Likely a bivalve shell, composed mainly of calcium carbonate (aragonite/calcite); exact species cannot be determined from one photo) — fossil

Shell fossil or shell fragment

Likely a bivalve shell, composed mainly of calcium carbonate (aragonite/calcite); exact species cannot be determined from one photo

Limestone (Chalk / Calcite Rock) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Chalk / Calcite Rock)

Calcium Carbonate (CaCO3)

Carved red coral bead (likely coral or coral-colored resin) (Corallium spp. (precious coral; calcium carbonate, CaCO₃)) — gemstone

Carved red coral bead (likely coral or coral-colored resin)

Corallium spp. (precious coral; calcium carbonate, CaCO₃)