Sandstone
Arenite (typically SiO2 + others)
sedimentary
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Coprolite
Coprolite
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Crinoidal Limestone
Bioclastic Limestone
Sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Fossiliferous Limestone (with Coralline Inclusions)
Calcium Carbonate (CaCO3)
sedimentary
Mosasaur Jaw Fossil in Matrix
Mosasaurus (family Mosasauridae) in Phosphate Sandstone
sedimentary
Crinoid Stem Fossil
Class Crinoidea (Phylum Echinodermata), often preserved in Limestone or Calcite (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
sedimentary
Stromatolite (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Tabulate Coral (Honeycomb Coral)
Favosites (Order: Tabulata)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Crinoid Stem Fossil
Crinoid columnal (Class Crinoidea)
sedimentary
Ammonite Fossil
Ammonitida (Extinct subclass of Cephalopoda)
sedimentary
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Fossiliferous Limestone (Coquina)
Calcite (CaCO3) with Bioclastic inclusions
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Chert (with possible fossils)
Microcrystalline quartz (SiO2)
sedimentary
Calamites
Calamites (Pith cast fossil)
sedimentary
Brachiopod Fossil
Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)
fossil
Orthoceras Fossil
Orthoceras regulare (Extinct Cephalopod)
fossil
Coal (Anthracite or Bituminous)
Carbon (C) with varying hydrocarbon and mineral impurities
sedimentary
Fossil Coral
Scleractinia (fossilized calcium carbonate)
sedimentary
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3)
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Ammonite Fossil
Ammonoidea (Calcium carbonate or Pyrite replacement)
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Ammonite Fossil
Ammonoidea (Calcium carbonate or Pyrite replaced)
sedimentary
Belemnite Fossil
Belemnitida (Order within Cephalopoda)
sedimentary
Fossil Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Trilobite Fossil
Trilobita (Class), likely Phacopid or Asaphid order
sedimentary
Ammonite Fossil
Ammonoidea (typically preserved as Calcite or Aragonite)
sedimentary
Favosite Fossil (Calyx or Rugose Coral)
Favosites (Extinct Tabulate Coral)
sedimentary
Turritella Agate (Fossiliferous Chert)
Silicified Elimia tenera (Fossiliferous Chalcedony)
sedimentary
Rugose Coral (Horn Coral)
Order Rugosa (extinct fossilized coral)
sedimentary
Fossilized Coral (Favosites)
Favosites (Extinct Tabulate Coral)
sedimentary
Fossilized Coral
Anthozoa (Fossilized)
Sedimentary / Fossil
Fossilized Coral (Petoskey Stone or similar Hexagonaria variant)
Hexagonaria percarinata (Fossilized Coral)
sedimentary