Fossiliferous Limestone
Biogenic Calcium Carbonate (CaCO3)
sedimentary
Category
Fossil
Browse fossil specimens identified by the Rock Identifier community.
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Fossilized Bone (Petrified Bone)
Permineralized Vertebrate Remains
sedimentary
Fossilized Dinosaur Skull (Tyrannosaurus rex)
Tyrannosaurus rex (permineralized fossil), rich in Hydroxylapatite/Silica
sedimentary
Petrified Wood
Silicified wood (Quartz, SiO2)
metamorphic
Chert (with possible fossils)
Microcrystalline quartz (SiO2)
sedimentary
Fossiliferous Limestone
Sedimentary Limestone (CaCO3) containing Crinoid or Brachiopod remains
fossil
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (Riprap)
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Calcium carbonate matrix with macrofossils (CaCO3)
fossil
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Fossiliferous Limestone
Limestone with fossil bioclasts (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone (with Crinoids)
CaCO3 (Calcium Carbonate)
sedimentary
Turritella Agate
Silicified Elimia tenera Fossil (SiO2)
sedimentary
Shark Tooth Fossil
Lamniformes (Shark tooth fossil composed of Fluorapatite)
fossil
Fossilized shell, likely gastropod or bivalve
Recrystallized carbonate fossil; original shell likely aragonite or calcite (taxon indeterminate)
fossil
Fossil Coral (Petoskey Stone or Chain Coral Pebble)
Hexagonaria percarinata / Rugosa coral (CaCO3)
fossil
Fossiliferous Limestone (Coquina / Shell Limestone)
Bioclastic Limestone (CaCO3)
sedimentary
Ironstone Nodule
Ferruginous Siltstone/Sandstone
sedimentary
Ironstone Nodules / Siderite Concretion
Siderite (FeCO3) / Ferruginous Septarian Concretion
sedimentary
Fossiliferous Limestone
Limestone (composed primarily of calcite with included fossils CaCO3)
Sedimentary
Siltstone with Fossil Cast
Sedimentary Rock (Siltstone / Fine-grained Sandstone)
sedimentary
Petrified Wood
Silicified Wood (Quartzo-feldspathic fossil wood)
fossil
Fossilized coral (likely honeycomb or branching coral)
Fossil coral; probable Scleractinia or Tabulata, composition mainly microcrystalline CaCO₃
fossil
Orthoceras fossil in limestone
Orthoceras regulare (extinct nautiloid cephalopod)
fossil
Polished brecciated jasper (likely ocean jasper or orbicular jasper)
Silica-rich chalcedony/microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions
mineral
Polished/sectioned agate geode
Microcrystalline quartz (SiO₂), chiefly chalcedony with possible druzy quartz
mineral
Sandstone
Arenite (SiO2 dominated sandstone)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Chert (Beach Pebble)
Silicon Dioxide (SiO2)
sedimentary
Coal
Bituminous or Anthracite coal (carbon-rich sedimentary rock)
sedimentary
Coral Fossil (Agatized Coral or Petoskey Stone)
Hexagonaria percarinata (if Petoskey) or generally Scleractinia (Agatized Coral)
Sedimentary/Fossil
Coal (Anthracite or Bituminous)
Lithified plant matter (Carbon)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement) SiO2
sedimentary
Gastropod Fossil (Internal Mold)
Phylum Mollusca, Class Gastropoda (Steinkern)
sedimentary