Rock Identifier

Category

Sedimentary (Fossil)

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

Learn about Sedimentary (Fossil) in the encyclopedia

Fossil Opal

Fossiliferous Limestone

Fossiliferous Limestone

Bone Opal

Turritella Jasper

Turritella Agate

Turritella Agate

Amber

Petrified Wood

Diatomite

Guano

Conglomerate

Jet

Diatomaceous Earth

Dolomite or Limestone (Carbonate Rock) (CaMg(CO3)2 (Dolomite) or CaCO3 (Limestone / Calcite)) — sedimentary

Dolomite or Limestone (Carbonate Rock)

CaMg(CO3)2 (Dolomite) or CaCO3 (Limestone / Calcite)

Sulfidic Mudstone with Pyrite/Goethite (Sulfidic Siltstone/Mudstone (FeS2)) — sedimentary

Sulfidic Mudstone with Pyrite/Goethite

Sulfidic Siltstone/Mudstone (FeS2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Sandstone with Liesegang Rings (Clastic sedimentary rock (Sandstone with iron oxide rhythmic precipitation)) — sedimentary

Sandstone with Liesegang Rings

Clastic sedimentary rock (Sandstone with iron oxide rhythmic precipitation)

Limestone (Karst formation) (Calcium Carbonate (CaCO3)) — sedimentary

Limestone (Karst formation)

Calcium Carbonate (CaCO3)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

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

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone (Arenite (Secondary classification based on grain size)) — sedimentary

Sandstone

Arenite (Secondary classification based on grain size)

Micaceous Sandstone or Quartzite (Sandstone (lithified quartz grains, often with mica) or Quartzite (metamorphosed sandstone)) — Sedimentary or Metamorphic

Micaceous Sandstone or Quartzite

Sandstone (lithified quartz grains, often with mica) or Quartzite (metamorphosed sandstone)

Sedimentary or Metamorphic

Petoskey Stone (Hexagonaria percarinata (Fossilized Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Coral)

Vesicular basalt (likely scoria) (Mafic volcanic rock; predominantly plagioclase, pyroxene, and volcanic glass, with possible olivine) — igneous

Vesicular basalt (likely scoria)

Mafic volcanic rock; predominantly plagioclase, pyroxene, and volcanic glass, with possible olivine

Sandstone or Mudstone with Iron Staining (Ferruginous Sandstone/Mudstone) — Sedimentary

Sandstone or Mudstone with Iron Staining

Ferruginous Sandstone/Mudstone

Petoskey Stone (Hexagonaria percarinata (Fossilized Rugose Coral)) — sedimentary

Petoskey Stone

Hexagonaria percarinata (Fossilized Rugose Coral)

Slate (Foliated Metamorphic Rock) — metamorphic

Slate

Foliated Metamorphic Rock

Weathered agate or chalcedony nodule (Microcrystalline quartz (SiO₂), likely agate/chalcedony with iron-oxide staining) — mineral

Weathered agate or chalcedony nodule

Microcrystalline quartz (SiO₂), likely agate/chalcedony with iron-oxide staining

Amber (Succinate (Fossilized Tree Resin)) — mineraloid

Amber

Succinate (Fossilized Tree Resin)

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Amber (Succinite (fossilized resin, C10H16O)) — mineral

Amber

Succinite (fossilized resin, C10H16O)

Crushed Stone (Gravel/Aggregates) (Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)) — sedimentary and igneous (mixed)

Crushed Stone (Gravel/Aggregates)

Crushed rock aggregate (varied composition including Granite, Limestone, and Quartz)

sedimentary and igneous (mixed)

Amber (Succinite (fossilized resin)) — mineral

Amber

Succinite (fossilized resin)

Amber (Resinite / Fossilized Tree Resin) — mineral

Amber

Resinite / Fossilized Tree Resin

Amber (Succinite (fossilized organic resin)) — mineral

Amber

Succinite (fossilized organic resin)

Amber (Succinite (fossilized resin); C10H16O) — mineraloid

Amber

Succinite (fossilized resin); C10H16O

Amber (Succinite (fossilized tree resin), C10H16O) — Organic Gemstone

Amber

Succinite (fossilized tree resin), C10H16O

Organic Gemstone

Petrified Wood (Agatized/Silicified Wood) (Silicified Wood (SiO2)) — metamorphic

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2 permineralization)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

Limestone (Calcium Carbonate (CaCO3) / Limestone) — sedimentary

Limestone

Calcium Carbonate (CaCO3) / Limestone

Sandstone (Iron-stained) (Quartz Arenite with Iron Oxide Stain (SiO2 + Fe2O3)) — sedimentary

Sandstone (Iron-stained)

Quartz Arenite with Iron Oxide Stain (SiO2 + Fe2O3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Amber (Succinite (fossilized tree resin)) — mineral

Amber

Succinite (fossilized tree resin)

Tumbled agate (probable moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron/manganese dendritic inclusions) — mineral

Tumbled agate (probable moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron/manganese dendritic inclusions

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Asphalt (Bituminous Pavement Bit) (Bitumen-bound aggregate (Petrochemical-bound composite)) — sedimentary (anthropogenic/technogenic)

Asphalt (Bituminous Pavement Bit)

Bitumen-bound aggregate (Petrochemical-bound composite)

sedimentary (anthropogenic/technogenic)

Crushed Limestone (Calcium Carbonate (CaCO3)) — Sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Fighting Conch (Sea Shell) (Strombus alatus (primarily composed of Calcium Carbonate / CaCO3)) — mineral

Fighting Conch (Sea Shell)

Strombus alatus (primarily composed of Calcium Carbonate / CaCO3)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Slate (Slate (Metamorphic Rock)) — metamorphic

Slate

Slate (Metamorphic Rock)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert (within Asphalt) (Chert (SiO2)) — sedimentary

Chert (within Asphalt)

Chert (SiO2)

Rounded gray limestone pebble with a calcite vein (Calcitic limestone, composed predominantly of calcite (CaCO₃), locally cut by a white calcite vein) — sedimentary

Rounded gray limestone pebble with a calcite vein

Calcitic limestone, composed predominantly of calcite (CaCO₃), locally cut by a white calcite vein