Ammonite Fossil
Ammonoidea
fossil
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Fossil Coral
Rugosa or Tabulata coral fossil (Calcium Carbonate, CaCO3)
fossil
Fossil Coral
Hexagonaria or Rugose Coral (petoskey stone / fossilized rugose or tabulate coral)
fossil
Fossil Coral
Hexagonaria (Rugose coral) / Rugosa
fossil
Fossil Coral
Hexagonaria / Rugose coral (Fossilized calcium carbonate)
fossil
Fossil Coral
Hexagonaria or similar rugose/tabulate coral fossil (Calcium Carbonate, CaCO3)
fossil
Fossil Coral
Rugosa or Tabulata coral fossil (Calcite/Silica replacement)
fossil
Fossil Coral
Scleractinia (Fossilized Hexacoral)
fossil
Fossil Coral
Hexagonaria (or Rugose/Tabulate coral fossilized in calcium carbonate)
fossil
Limestone with Fossil
Sedimentary limestone, calcium carbonate (CaCO3)
sedimentary
Fossil Coral
Phylum Cnidaria / Scleractinia
fossil
Belemnite Fossil
Belemnitella sp. (rostrum)
fossil
Brachiopod Fossil
Brachiopoda (Phylum); often Atrypa or Mucrospirifer genus depending on locality
fossil
Fossil Coral
Tabulate Coral (potentially Favosites or Calapoecia)
fossil
Murex Fossil
Muricidae (Calcium Carbonate fossilization)
fossil
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Ammonite Fossil
Ammonoidea (primarily composed of Calcite, CaCO3)
sedimentary
Fossil Coral
Scleractinia (fossilized calcium carbonate)
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Belemnoit (Fossil)
Belemnoidea (Order), Rostrum / Guard
sedimentary
Ammonite Fossil
Ammonoidea (Calcium carbonate or Pyrite replaced)
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Belemnite Fossil
Belemnitida (Order within Cephalopoda)
sedimentary
Ammonite Fossil
Ammonoidea (typically preserved as Calcite or Aragonite)
sedimentary
Fossil Coral
Scleractinia (fossil order), primarily Calcium Carbonate (CaCO3)
sedimentary
Trilobite Fossil
Trilobita (Class), likely Phacopid or Asaphid order
sedimentary
Weathered fossiliferous limestone pebble (possible fossil fragment)
Calcite-rich limestone, primarily CaCO₃; the visible lines may be calcite-filled fractures
sedimentary
Turritella Gastropod Fossil
Turritella (mollusk fossil in sedimentary matrix)
fossil
Trace Fossil (Lichenandites or Rhynie Chert Chert with Microfossils)
Trace fossil in microcrystalline quartz (SiO2)
fossil
Mixed beach-stone collection, primarily quartz-rich pebbles and possible fossils
Likely quartz (SiO₂), quartzite, chert, and carbonate rock; exact identification is uncertain from the image
sedimentary
Fossilized belemnite guard (likely)
Belemnitella or related belemnite; fossil calcite (CaCO₃)
fossil
Limestone
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone containing a Brachiopod or Mollusk Impression
Biogenic Sedimentary Rock / Fossiliferous Limestone
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Fossiliferous limestone (likely orthoceras or crinoid-bearing limestone)
Bioclastic carbonate rock; commonly calcite (CaCO₃) with fossil fragments
fossil
Fossiliferous Limestone
CaCO3 (with biological inclusions)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (primarily CaCO3)
sedimentary
Limestone
CaCO3 (principally Calcite)
sedimentary
Fossilized Shark Tooth
Selachimorpha fossil (varies by species)
fossil
Amber
Succiniferous fossil resin (C10H16O)
fossil
Fossiliferous Shale or Slate with Plant Fossils
Fossil-bearing argillaceous rock
Sedimentary/Metamorphic
Fossiliferous Limestone (with Rugose Coral)
Limestone with Tetracoralla (Rugosa) fossil
fossil