Shale
Clastic sedimentary rock (primarily clay and silt minerals)
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Chert Concretion
Silicon dioxide (SiO2)
sedimentary
Fossilized Tabulate Coral
Favosites (Honeycomb Coral)
fossil
Sandstone with Trace Fossils
Arenite with Ichnofossils
sedimentary
Petrified Wood and Mixed Rocks
Silicified Wood (SiO2)
fossil
Petrified Wood (Silicified Wood)
Silicified fossil wood (SiO2)
metamorphic
Amber
Succiniferous fossil resin (C10H16O)
mineraloid
Ironstone (Limonite/Hematite concretion)
Ferruginous Siltstone / Goethite (FeO(OH))
sedimentary
Fossilized tooth, likely a mammalian tooth fragment
Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth
fossil
Fossil shark teeth
Likely fossilized shark teeth; exact species indeterminate from the image, possibly Carcharhiniformes or related taxa
fossil
Sandstone
Arenite
sedimentary
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide staining)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Coal (Anthracite or Bituminous)
Carbon (C) with varying hydrocarbon and mineral impurities
sedimentary
Sandstone
Arenite
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (Quartzite-leaning)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone
Arenite (primary component SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with iron oxide cement)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth in Matrix
Otodus obliquus (Chondrichthyes: Lamniformes)
fossil
Fossil Shark Tooth
Phylum Chordata, Class Chondrichthyes (Possibly Cretalamna or Otodus)
fossil
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Fossilized Coral (Petoskey-like or Favosites)
Anthozoa (Fossilized Coral)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone Concretion
Sedimentary Concretion (Quartz sand bound by mineral cement)
sedimentary
Weathered fossiliferous limestone or fossil fragment
Indeterminate bioclastic carbonate rock; likely calcite (CaCO₃) with fossil shell material
fossil
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Rugose Coral Fossil
Order Rugosa
fossil
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Order: Rugosa)
sedimentary
Orthoceras Fossil in Limestone
Orthoceras (extinct genus of cephalopods), mineralized as Calcite (CaCO3) in Fossiliferous Limestone
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary