Brachiopod Fossil in Shale
Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)
sedimentary
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Fossiliferous Limestone
CaCO3 (principally Calcite or Aragonite)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Biogenic Inclusions
sedimentary
Fossil coral fragment
Likely calcitic colonial coral, possibly fossilized scleractinian coral
fossil
Weathered sandstone pebble
Quartz-rich sandstone, commonly arkose or lithic sandstone
sedimentary
Limestone
Sedimentary Calcite (CaCO3)
sedimentary
Ironstone Concretion
Siderite or Hematite Concretion (FeCO3 or Fe2O3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Fossiliferous Limestone
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Weathered limestone
Calcite-rich carbonate rock (mostly CaCO₃), possibly fossiliferous limestone
sedimentary
Fossilized Oyster Shell
Ostreidae (Calcium Carbonate - CaCO3)
fossil
Fossiliferous Limestone
Bioclastic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (CaCO3)
sedimentary
Fossiliferous Chert (with Fossil Shells)
Silicon Dioxide (SiO2) with biogenic inclusions
sedimentary
Larimar and Fossil Coral
Pectolite (NaCa2Si3O8(OH)) and Hexagonaria/Petoskey Stone
mineral and sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
sedimentary
Fossil bivalve shell
Fossilized mollusk (Bivalvia), likely oyster or related species; exact genus requires locality and preparation
fossil
Fossil gastropod (snail shell)
Fossilized gastropod; original shell likely aragonite or calcite (CaCO₃), now partly mineral-replaced
fossil
Polished fossil ammonite slice
Ammonoidea (commonly polished juvenile ammonite or nautiloid-like cephalopod fossil)
fossil
Coral Fossil (Fossilized Coral)
Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)
fossil
Fossilized Coral (Petoskey Stone / Favosites)
Hexagonaria percarinata / Favosites sp. (Calcite, CaCO3)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with fossil inclusions
sedimentary
Echinoid Fossil (Sea Urchin Fossil)
Echinoidea (phylum Echinodermata), often preserved as Calcite (CaCO3)
sedimentary
Worn River Pebble with Fossil Indentation
Sedimentary Rock with Fossil Infill
sedimentary
Fossilized Coral in Chert
Anthozoa (Class) fossil in Cryptocrystalline Quartz (SiO2)
fossil
Fossiliferous Limestone (Crinoidal Limestone)
Bioclastic grainstone (CaCO3)
sedimentary
Fossil Shark Tooth
Elasmobranchii tooth fossil (e.g., Otodus / Carcharocles)
fossil
Fossilized Shark Tooth (Drum Fish Tooth/Pavement Tooth)
Sparidae or Sciaenidae (Crushing plate dental fossil)
fossil
Tumbled fossil-bearing limestone (likely crinoid or shell fragment)
Fossil carbonate; predominantly calcite (CaCO₃)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil
Turritella Agate / Fossiliferous Limestone
Elimia tenera in Chalcedony/Calcite Matrix
fossil
Limestone (Carved Statue)
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Arenite
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (Red)
Arenite (primarily SiO2 with Fe2O3)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary