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

Chert or flint fragment (Microcrystalline quartz (SiO₂), commonly chalcedony with cryptocrystalline quartz) — sedimentary

Chert or flint fragment

Microcrystalline quartz (SiO₂), commonly chalcedony with cryptocrystalline quartz

Amber (Succinurite (C10H16O)) — mineraloid

Amber

Succinurite (C10H16O)

Chert (Nodular Chert) (Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodular Chert)

Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — Mineral / Fossil

Petrified Wood

Silicified Wood (SiO2)

Mineral / Fossil

Chert (Nodule) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Chert (Flint / Jasper)

Microcrystalline Quartz (SiO2)

Beach-worn fossil bone or coral fragment (Indeterminate biogenic calcium-carbonate material; likely fossilized bone (hydroxyapatite) or coral (calcite/aragonite)) — fossil

Beach-worn fossil bone or coral fragment

Indeterminate biogenic calcium-carbonate material; likely fossilized bone (hydroxyapatite) or coral (calcite/aragonite)

Sandstone (likely Quartzose type) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose type)

Clastic sedimentary rock (primarily SiO2)

Fossilized Shark Teeth (Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)) — sedimentary (fossilized organic matter)

Fossilized Shark Teeth

Carcharhiniformes or Lamniformes species (common mineral: Fluorapatite/Ca5(PO4)3F)

sedimentary (fossilized organic matter)

Weathered fossil shell fragment (Likely molluscan shell, composed mainly of calcium carbonate (aragonite or calcite); exact taxon is indeterminate from the image) — fossil

Weathered fossil shell fragment

Likely molluscan shell, composed mainly of calcium carbonate (aragonite or calcite); exact taxon is indeterminate from the image

Amber (Succinite (with approximate formula C10H16O)) — mineraloid

Amber

Succinite (with approximate formula C10H16O)

Chert (Smoky Variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Smoky Variety)

Microcrystalline Quartz (SiO2)

Mica schist (likely biotite–muscovite schist) (Mica schist; chiefly quartz (SiO₂) plus muscovite and biotite mica, with possible garnet or graphite) — metamorphic

Mica schist (likely biotite–muscovite schist)

Mica schist; chiefly quartz (SiO₂) plus muscovite and biotite mica, with possible garnet or graphite

Fossil Shark Tooth (Carcharhinidae or Lamniformes sp. (possibly Carcharodon or Otodus genus)) — fossil

Fossil Shark Tooth

Carcharhinidae or Lamniformes sp. (possibly Carcharodon or Otodus genus)

Petrified Wood (Silicified Wood (primarily Quartz / Chalcedony: SiO2)) — metamorphic

Petrified Wood

Silicified Wood (primarily Quartz / Chalcedony: SiO2)

Stromatolite (Biogenic Sedimentary Rock (composed predominantly of CaCO3)) — sedimentary

Stromatolite

Biogenic Sedimentary Rock (composed predominantly of CaCO3)

Likely fossil tooth or tooth fragment (Indeterminate fossilized vertebrate tooth; possibly shark or marine reptile, identification uncertain from the image) — fossil

Likely fossil tooth or tooth fragment

Indeterminate fossilized vertebrate tooth; possibly shark or marine reptile, identification uncertain from the image

Seashell Fragment (Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite) — mineral

Seashell Fragment

Calcium Carbonate (CaCO3) in the form of Aragonite or Calcite

Possible fossilized tooth fragment (Indeterminate fossil enamel/dentine; possibly shark tooth fragment) — fossil

Possible fossilized tooth fragment

Indeterminate fossil enamel/dentine; possibly shark tooth fragment

Crinozoan fossil (Crinoid stem fragment) (Crinoid (Class Crinoidea)) — fossil

Crinozoan fossil (Crinoid stem fragment)

Crinoid (Class Crinoidea)

Fossiliferous Limestone with Crinoid stems (Calcite-rich Biogenic Sedimentary Rock (CaCO3)) — sedimentary

Fossiliferous Limestone with Crinoid stems

Calcite-rich Biogenic Sedimentary Rock (CaCO3)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Rounded gray-brown cobble, likely weathered sandstone or quartz-rich sedimentary rock (Probable lithic sandstone; exact identification requires a fresh surface and hardness/streak tests) — sedimentary

Rounded gray-brown cobble, likely weathered sandstone or quartz-rich sedimentary rock

Probable lithic sandstone; exact identification requires a fresh surface and hardness/streak tests

Chert / Flint (with Jasper inclusions) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint (with Jasper inclusions)

Microcrystalline Quartz (SiO2)

Polished fossil shell fragment (likely ammonite or bivalve) (Fossilized mollusk shell; likely aragonite/calcite replaced by silica or iron-rich minerals) — fossil

Polished fossil shell fragment (likely ammonite or bivalve)

Fossilized mollusk shell; likely aragonite/calcite replaced by silica or iron-rich minerals

Pearl (Calcium Carbonate (CaCO3) with Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

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

Flint (Chert Nodules)

SiO2 (Cryptocrystalline Quartz)

Calcite (or Travertine / Limestone) (Calcium Carbonate (CaCO3)) — sedimentary

Calcite (or Travertine / Limestone)

Calcium Carbonate (CaCO3)

Chert (varieties include Flint and Jasper) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Polished fossil-bearing limestone pebble (Bioclastic limestone, chiefly calcite (CaCO₃), possibly containing a small shell or coral fragment) — sedimentary

Polished fossil-bearing limestone pebble

Bioclastic limestone, chiefly calcite (CaCO₃), possibly containing a small shell or coral fragment

Calcite (Calcium Carbonate (CaCO3)) — mineral

Calcite

Calcium Carbonate (CaCO3)

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

Fossiliferous Limestone

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Amber (Succinite (organic fossilized resin)) — mineraloid

Amber

Succinite (organic fossilized resin)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Chert Arrowhead (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Arrowhead

Cryptocrystalline Quartz (SiO2)

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

Chert (often called Flint)

Chert (Microcrystalline Quartz, SiO2)

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

Fossiliferous Limestone

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

Polished brown flint/chert nodule (Microcrystalline quartz (SiO₂), commonly called flint or chert) — sedimentary

Polished brown flint/chert nodule

Microcrystalline quartz (SiO₂), commonly called flint or chert

Chert (Silicon dioxide (SiO2)) — sedimentary

Chert

Silicon dioxide (SiO2)

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

Chert (Flint/Jasper)

Microcrystalline Quartz (SiO2)