Fossiliferous Limestone containing a Brachiopod or Mollusk Impression
Biogenic Sedimentary Rock / Fossiliferous Limestone
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Petrified Wood Fragment
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineralized Apatite / Bio-apatite)
fossil
Crinoid Fossil in Limestone
Crinoidea (class) in Fossiliferous Limestone
fossil
Limestone Pebble with Crinoid Fossil
Calcium Carbonate (CaCO3) - Fossiliferous Limestone
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Fossil-bearing limestone (possible shell fossil)
Fossiliferous limestone, composed mainly of calcite (CaCO₃)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Chert (Nodule)
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)
Trace fossil in microcrystalline quartz (SiO2)
fossil
Silicified Snail Fossil
Gastropod (likely replaced by Chalcedony/Quartz - SiO2)
fossil
Orthoceras Fossil
Orthoceras regulare (Extinct Cephalopod)
fossil
Fossil Coral
Hexagonaria or Rugose Coral (Fossilized Calcium Carbonate / Silica)
fossil
Ammonite Fossil
Ammonoidea (Calcium carbonate or Pyrite replacement)
sedimentary
Brachiopod Fossil
Brachiopoda (Phylum); often Atrypa or Mucrospirifer genus depending on locality
fossil
Sandstone
Arenite
sedimentary
Weathered chert or silicified limestone nodule
Microcrystalline quartz (SiO₂), possibly replacing limestone; exact identification requires testing
sedimentary
Fossilized Mosasaur Tooth
Mosasauridae (likely Prognathodon or Mosasaurus)
fossil
Goniatite Fossil
Order Goniatitida
fossil
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Fossiliferous sandstone with plant fossils
Likely fossil-bearing siliciclastic sedimentary rock; apparent fragments may be fossil wood or leaf impressions, but species cannot be determined from the image
fossil
Fossil Coral
Hexagonaria or Rugose coral fossil (replaced by silica/chalcedony)
fossil
Fossil Coral
Hexagonaria or Rugose Coral (petoskey stone / fossilized rugose or tabulate coral)
fossil
Rugose Coral Fossil
Order Rugosa
fossil
Brachiopod Fossil
Phylum Brachiopoda (Class Rhynchonellata)
sedimentary
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Insect in Nodular Matrix
Invertebrata / Insecta fossil in sedimentary concretion
fossil
Fossilized Shark Tooth
Carcharocles sp. or similar Lamniformes
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock
sedimentary
Fossilized Gastropod Shell
Gastropoda (Class)
sedimentary
Seashell Fossil
Invertebrate fossil (phylum Mollusca)
fossil
Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
sedimentary
Stromatolite Fossil
Stromatolite (Cyanobacteria biogenic sedimentary structure)
fossil
Fossil oyster shell
Fossilized bivalve, likely an oyster (family Ostreidae); exact genus and age are indeterminable from the image
fossil
Flint / Chert
Silicon Dioxide (SiO2)
sedimentary
Ammonite Fossil (Iridiscent)
Ammonoidea (subclass)
fossil
Lepidodendron Fossil (Scale Tree)
Lepidodendron
fossil
Brachiopod Fossil in Sedimentary Rock
Phylum Brachiopoda fossil imprint in sedimentary matrix
fossil
Amber
Succiniferous fossil resin (C10H16O)
mineraloid