Weathered limestone
Calcite-rich carbonate rock (mostly CaCO₃), possibly fossiliferous limestone
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
fossil
Bivalve Internal Mold Fossil
Steinkern (Mollusca: Bivalvia)
fossil
Conglomerate
Clastic Sedimentary Rock
sedimentary
Oyster Shell (Biogenic Calcium Carbonate)
Crassostrea virginica (or related species) - Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Biomicrite / Limestone with fossils
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Fossiliferous Limestone with Fossil Fragment
Fossiliferous Limestone (CaCO3 with organic remains)
fossil
Sandstone (Ferruginous)
Arenite (with Goethite/Limonite cement)
sedimentary
Sandstone
Arenite (SiO2 principal component)
sedimentary
Chert (with possible fossils)
Microcrystalline quartz (SiO2)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Sandstone (Iron-stained)
Arenite (primarily Quartz, SiO2)
sedimentary
Petrified Wood
Silicified Wood
fossil
Sandstone
Sandstone (Quartz-rich sedimentary rock)
sedimentary
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Fossiliferous Limestone (Crinoid stem fossils)
Sedimentary Limestone with Crinoidea ossicles
fossil
Sandstone
Arenite
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Fossilized Coral
Rugosa / Tabulata coral fossils replaced by silica (Chalcedony/Quartz)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Crinoid Fossil in Limestone
Crinoidea (Phylum Echinodermata) in Calcite Matrix (CaCO3)
fossil
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Fossilized bivalve shell
Bivalvia indeterminate; likely a fossil cockle or clam shell, aragonite/calcite replaced or preserved
fossil
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in Sedimentary Matrix (CaCO3)
fossil
Fossilized Coral
Rugose Coral / Hexagonaria (Fossilized calcium carbonate)
fossil
Cockle Shell (Bivalve)
Cardiidae (Calcium Carbonate, CaCO3)
fossil
Fossilized Shell in Limestone
Carbonate sedimentary rock with Bivalvia or Brachiopoda remains
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Fossiliferous Limestone
Carbonate sedimentary rock (CaCO3)
sedimentary
Fossil Coral
Hexagonaria / Rugose coral (Fossilized calcium carbonate)
fossil
Fossil Coral
Rugosa or Tabulata coral fossil (Calcite/Silica replacement)
fossil
Fossilized Dinosaur Bone
Perineralized Bone (Fluorapatite/Quartz replacement)
fossil
Fossilized Shark Tooth in Matrix
Otodus sp. (likely Otodus obliquus)
sedimentary
Concretion in Shale
Siltstone/Shale with Siderite or Calcareous concretions
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (Riprap)
Calcium Carbonate (CaCO3)
sedimentary
Echinoid Fossil (Sea Urchin Fossil)
Echinoidea (phylum Echinodermata), often preserved as Calcite (CaCO3)
sedimentary
Sandstone (Banded)
Arenite
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Red Sandstone
Arenite (predominantly SiO2 with Fe2O3)
sedimentary