Ferruginous Sandstone Concretion (Ironstone Phosphorite)
Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)
sedimentary
Category
Organic Specimen (Fossil)
Browse organic specimen (fossil) specimens identified by the Rock Identifier community.
Learn about Organic Specimen (Fossil) in the encyclopedia
View all →
Fossilized Shark Tooth
Chondrichthyes (class) fossilized tooth
fossil
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
sedimentary
Fossiliferous Limestone (Crinoidal)
Calcite-bearing bioclastic packstone (CaCO3)
sedimentary
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Fossil Coral
Phylum Cnidaria / Rugosa or Tabulata
fossil
Crinoid Stem Fossil in Chert
Crinoid columnal ossicles (phylum Echinodermata) embedded in microcrystalline quartz (chert)
fossil
Petrified Wood
Silicified Wood (primarily SiO₂ - Silicon Dioxide)
metamorphic
Amber
Succinite (fossilized resin, C10H16O)
mineral
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Chert Concretion
Microcrystalline Quartz (SiO2) in Carbonate Matrix
sedimentary
Seashell Fossil
Gastropoda fossil
fossil
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Siderite Concretion in Shale
Iron carbonate (FeCO3) in Mudstone/Shale matrix
sedimentary
Ironstone Concretion
Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Mammoth Molar Fossil
Mammuthus primigenius (Tooth fragment)
fossil
Weathered limestone or calcareous sandstone
Calcite-rich carbonate rock, chiefly calcium carbonate (CaCO₃), possibly fossiliferous limestone
sedimentary
Fossiliferous Flint
Microcrystalline Quartz (SiO2) with Echinoid Fossil
sedimentary
Weathered limestone or calcitic fossil/reef fragment
Calcite-rich limestone (CaCO₃), possibly fossiliferous limestone
sedimentary
Fossiliferous Limestone
Calcite (CaCO3) matrix with biogenic fragments
sedimentary
Fossiliferous Limestone
Fossiliferous Calcilutite / Biomicrite
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Amber
Resinite / Fossilized Tree Resin
mineral
Fossilized Nut / Coprolite / Concretion
Trace Fossil / Permineralized Plant Material
fossil
Fossiliferous Limestone / Petrifaction
Sedimentary rock with fossil inclusions / Calcium Carbonate (CaCO3)
fossil
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Sand Tiger Shark Tooth
Carcharias taurus (fossilized)
fossil
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Ripple Marks or Stromatolite
Sedimentary ripple mark imprint / Biosedimentary structure
fossil
Fossilized Coral (Rugose or Tabulate) or Stromatolite
Phylum Cnidaria / Stromatolithus
fossil
Fossiliferous Shale
Carbonaceous Shale (with potential plant/aquatic fossils)
sedimentary
Fossiliferous Limestone (Coquina / Shell Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Fossilized Gastropod Internal Mold
Gastropoda (Steinkern fossil)
fossil
Fossilized Wood / Petrified Wood
Petrified Wood (Silicified Flora)
fossil
Amber
Succinite (Approximate formula: C10H16O)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Mammoth or Mastodon Tooth Fossil
Mammuthus / Mammut tooth
fossil
Fossil-bearing Sedimentary Rock
Sedimentum cum fossili
fossil