Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate with Fossils)
sedimentary
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Fossil Assortment and Geological Specimens
Various (including Ammonoidea)
fossil
Fossil tooth, possibly shark tooth
Indeterminate fossilized vertebrate tooth; likely a shark tooth (possibly *Carcharhinus* or related genus)
fossil
Orthoceras Fossil in Limestone
Orthoceras (extinct genus of cephalopods) in Carboniferous or Devonian Limestone
sedimentary
Fossil Coral
Scleractinia (Stony Coral) fossil
fossil
Fossilized Coral / Fossiliferous Limestone
Anthozoa fossil in Limestone (CaCO3)
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (primarily CaCO3)
sedimentary
Fossiliferous Limestone with Quartz Veining
Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Crinoidal Limestone
Bioclastic Limestone
Sedimentary
Orthoceras Fossil
Orthoceras sp. (Extinct genus of nautiloid cephalopod)
fossil
Fossiliferous Limestone
Biogenic Limestone (CaCO3 with fossil fragments)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony - SiO2)
sedimentary
Limestone with Stylolites
Calcareous sedimentary rock (CaCO3)
sedimentary
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (typically SiO2 + others)
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Fossiliferous Flint
Microcrystalline Quartz (SiO2) with Echinoid Fossil
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone Pebbles
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Fossiliferous Limestone with Rugose Coral
Lithostrotionella (Limestone Matrix - CaCO3)
sedimentary
Limestone with Gastropod Fossil
Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion
fossil
Fossil Coral
Anthozoa fossil (Calcite / SiO2 replacement)
fossil
Tumbled fossil-bearing limestone or chert
Microcrystalline calcite (limestone), possibly silicified; fossil fragments visible
fossil
Limestone with Fossil Inclusion
Calcium Carbonate (CaCO3)
sedimentary
Tumbled snowflake obsidian
Obsidian (volcanic glass), commonly with cristobalite spherulites
igneous
Polished septarian nodule
Calcite–aragonite–barite septarian concretion, commonly in a claystone or limestone matrix
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Kambaba Jasper
Rhyolite (Volcanic rock) or Stromatolite (debated)
Igneous/Sedimentary (debated)
Petrified Wood / Fossilized Bone
Silicified / Mineralized Fossil (Silica SiO2)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Dinosaur Claw (Dromaeosaurid)
Dromaeosaurid ungual (potential Deinonychus or Velociraptorine)
fossil
Fossil Coral
Hexagonaria (Rugose coral) / Rugosa
fossil
Fossiliferous shale or slate with plant impressions
Carbonaceous mudstone/shale; possible fossil plant material (often fern-like impressions)
fossil
Fossilized Shark Tooth
Elasmobranchii (fossilized matrix/root section)
fossil
Orthoceras Fossil in Limestone
Orthoceras regulare
sedimentary
Likely polished/tumbled fossil shell or concretion
Indeterminate; possibly a fossil bivalve or gastropod in mineralized matrix
fossil
Coral Skeleton (Scleractinia)
Aragonite (CaCO3) biomineralisation within Anthozoa
fossil
Crinoid Fossil in Chert
Siliceous limestone with Crinoidea fossil (SiO2)
sedimentary