Sandstone
Arenite (SiO2 primarily)
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Crinoidal Limestone
Bioclastic Limestone
Sedimentary
Dinosaur Claw (Dromaeosaurid)
Dromaeosaurid ungual (potential Deinonychus or Velociraptorine)
fossil
Fossilized Wood / Petrified Wood
Petrified Wood (Silicified Flora)
fossil
Fossiliferous conglomerate
Bioclastic, carbonate-cemented conglomerate (likely limestone matrix)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossiliferous Flint
Microcrystalline Quartz (SiO2) with Echinoid Fossil
sedimentary
Siderite Concretion
Ironstone (Siderite) Concretion, FeCO3
sedimentary
Likely limestone or calcareous fossil fragment
Calcite-rich carbonate rock; possibly bioclastic limestone (CaCO₃)
sedimentary
Shale
Lutaceous Rock (Hydrous Aluminum Silicates)
sedimentary
Likely fossiliferous limestone or dolostone
Micritic limestone, chiefly calcite (CaCO₃), possibly dolomitized; apparent fossil or stylolitic markings
sedimentary
Limestone with Fossil Inclusion
Calcium Carbonate (CaCO3)
sedimentary
Weathered fossil shell or crinoid fragment
Likely fossilized echinoderm or bivalve fragment; exact taxon indeterminate from the image
fossil
Amber (Copal)
Succiniferous Resin
mineraloid
Fossil Shark Tooth (Cretaceous white shark type)
Squalicorax (commonly known as Crow Shark)
Organic specimen (fossil)
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda, Class Rhynchonellata
sedimentary
Fossilized Shark Tooth
Scapanorhynchus (Sand Tiger Shark relative)
sedimentary
Fossiliferous limestone
Calcitic limestone, predominantly CaCO₃ (calcite), with possible shell or coral fossils
sedimentary
Fossil Coral (Rugose Coral Fragment)
Rugosa (extinct order of solitary and colonial corals)
sedimentary
Limestone (with Iron-Oxide staining)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Shale
Lutaceous sedimentary rock
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)
Phylum Echinodermata, Class Echinoidea
sedimentary
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (Mineral: Fluorapatite)
mineral
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
sedimentary
Sandstone concretion
Arenite sedimentary rock (concretion/nodule)
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Fossil scallop shell
Pectinid bivalve fossil; likely a scallop (family Pectinidae), exact genus/species uncertain
fossil
Belemite Rostrum
Belemnoidea (Order)
fossil
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Fossil ammonite fragment
Ammonoidea; likely a partial planispiral ammonite shell, commonly preserved as calcite or replaced limestone
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth
fossil
Likely weathered limestone or marble fragment
Calcite-rich carbonate rock; likely limestone (CaCO₃), possibly recrystallized marble
sedimentary
Fossiliferous limestone
Bioclastic limestone, primarily calcite (CaCO₃)
sedimentary
Sandstone
Arenite
sedimentary
Fossiliferous limestone pebble (probable coral or shell fossil)
Calcite (CaCO₃), commonly biogenic limestone; exact fossil taxon indeterminate from the image
fossil
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Arkose/Quartzose)
Arenite (SiO2 based clastic rock)
sedimentary
Fossilized Shark Tooth
Carcharocles sp. or similar (Fossilized Fluorapatite)
sedimentary