Limestone with Lichen
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Kambaba Jasper (Crocodile Jasper)
Stromatolite Fossil (Silicified Stromatolite / Quartz with Microfossils)
fossil
Fossilized Chiton (Polyplacophora)
Polyplacophora (fossilized valves)
mineralized fossil
Hag Stone
Perforated Sedimentary Rock (Typically Limestone or Sandstone)
sedimentary
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
sedimentary
Glauconitic Sandstone (Greensand pebble)
Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
Siltstone
Siltstone (primarily composed of SiO2)
sedimentary
Coquina (Fossiliferous Limestone)
Coquina (Organic Clastic Limestone)
sedimentary
Ironstone Concretion / Limonite Node
Goethite / Limonite (FeO(OH)·nH2O)
sedimentary
Bituminous Coal
Bituminous coal (Organic Sedimentary Rock)
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Chert (variously known as Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossil shark tooth
Likely Otodus megalodon (species identification uncertain from image)
fossil
Fossil Coral (Petoskey / Horn Coral Sliced Button)
Scleractinia / Rugosa (Silurian-Devonian Anthozoa)
fossil
Obsidian and Fossilized Shark Tooth
Obsidian (Volcanic Glass) and Otodus sp. (Fossilized shark tooth)
igneous and fossil
Amber
Succinite (C10H16O)
gemstone
Fossilized Shark Tooth (Scapanorhynchus)
Scapanorhynchus texanus
fossil
Sandstone
Sandstone (clastic sedimentary rock)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Ferruginous Sandstone (Gritstone)
Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)
sedimentary
Fossilized trilobite
Trilobita; likely an enrolled asaphid or phacopid trilobite
fossil
Fossil brachiopod shell
Brachiopoda indeterminate; possibly a strophomenid or spiriferid
fossil
Fossil coral (likely solitary rugose coral)
Rugosa; possibly genus Heliophyllum or similar
fossil
River Pebbles (Sandstone and Quartzite)
SiO2 (Quartz) dominated clastic rocks
sedimentary and metamorphic
Fossiliferous Limestone
Calcium carbonate (CaCO3) matrix with fossil inclusions
fossil
Fossil Shark Tooth
Carcharodon carcharias (modern/recent) or similar Lamniform fossil
fossil
Crinoid Stem Segment Fossil
Crinoidea (columnal ossicle)
fossil
Fossil gastropod shell
Fossilized marine gastropod; exact genus/species requires locality and examination
fossil
Polished ammonite fossil
Ammonoidea (likely a Jurassic or Cretaceous ammonite), preserved in limestone/mudstone
fossil
Fossil shark teeth
Probably fossilized shark teeth, possibly *Otodus* or *Carcharhinus* species
fossil
Horn Coral Fossil
Rugosa (Tetracoralla)
fossil
Crinoid Stem Fossil
Crinoidea (Class) / Calcite (CaCO3)
fossil
Rugose Coral Fossil
Order Rugosa (Tetracorallia)
fossil
Spinosaurus aegyptiacus Fossil
Spinosaurus aegyptiacus (permineralized hydroxyapatite)
fossil
Enrolled Trilobite Fossil
Phylum Arthropoda, Class Trilobita (likely Calymene or Flexicalymene)
fossil
Fossil Coral (Favosites)
Favosites sp. (Extinct Tabulate Coral)
fossil
Crinoid Stem Fossil
Class Crinoidea (Echinodermata)
fossil