Fossilized Rugose Coral
Order Rugosa
fossil
Category
Organic Specimen (Fossil)
Browse organic specimen (fossil) specimens identified by the Rock Identifier community.
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Crinoid Columnal Fossil
Crinoid ossicle (Class Crinoidea)
sedimentary
Sandstone (likely Graywacke or Lithic Sandstone)
Arenite / Wacke (SiO2 based with lithic fragments)
sedimentary
Sandstone Concretion
Ferruginous Sandstone Concretion
sedimentary
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock - Arenite
sedimentary
Ironstone with Pyrite
Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)
sedimentary
Ironstone Concretion
Limonitic/Hematitic Concretion
sedimentary
Petoskey Stone
Hexagonaria percarinata
fossil
Megalodon Tooth
Otodus megalodon
sedimentary
Conglomerate
Clastic Sedimentary Rock
sedimentary
Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Amber
Fossilized Tree Resin
gemstone
Quartz-rich sandstone or granitic fragment
Likely quartz–feldspar sandstone; exact identification is uncertain from the photograph
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Coal (Anthracite/Bituminous)
Carbo fossilium (primarily Carbon)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Chert / Flint Conglomerate
Silicified Sedimentary Breccia (primarily SiO2)
sedimentary
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
sedimentary
Limestone (Micritic)
Sedimentary rock mainly composed of Calcium Carbonate (CaCO3)
sedimentary
Ferruginous Sandstone (Gritstone)
Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Concretion
Sedimentary Concretion (Ironstone / Calcite Concretion)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Fossilized Coral (Petoskey Stone / Hexagonaria)
Hexagonaria percarinata / Rugosa coral (CaCO3)
fossil
Fossilized Coral
Rugose Coral (Order Rugosa) or Tabulate Coral
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Petoskey Stone
Hexagonaria percarinata (Silicified/Calcitic)
fossil
Syringopora Fossil (Chain Coral)
Syringopora (Order Sarcinulata)
fossil
Fossilized Brachiopod
Phylum Brachiopoda (likely Order Spiriferida or Orthida)
fossil
Fossilized Brachiopod
Brachiopoda (likely Order Spiriferida or Productida)
fossil
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Oyster shell fragment
Ostreidae shell; primarily calcite (CaCO₃)
fossil
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Coprolite
Coprolite (fossilized feces)
fossil
Fossil Coral (Rugose Coral)
Order Rugosa (Tetracorallia)
fossil
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary