Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Category
Sedimentary (Fossiliferous)
Browse sedimentary (fossiliferous) specimens identified by the Rock Identifier community.
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Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (Calcite, CaCO3)
sedimentary
Banded Mudstone (Siltstone Pebble)
Siltstone / Argillite (Fossiliferous Mudstone)
sedimentary
Fossilized Gastropod in Limestone
Gastropoda (Class) in Fossiliferous Limestone
sedimentary
Fossiliferous Limestone (or Bryozoan/Coral Fossil Pebble)
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
White limestone or chalky carbonate rock
Calcite-rich limestone; possibly chalk (CaCO₃)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Sedimentary Rock
Sedimentary Rock with Invertebrate Fossil Imprint
fossil
Fossiliferous Limestone (Crinoidal Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Sandstone / Fossil Fragment
Fossiliferous Sedimentary Matrix with Indeterminate Fossil Material
fossil
Crinoid Fossil in Limestone
Crinoidea (class) in Fossiliferous Limestone
fossil
Fossilized Oyster Shell (Limestone/Coquina)
Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone Pebble
Calcium Carbonate (CaCO3) with Biogenic Inclusions
sedimentary
Chert (with Fossiliferous Silicification)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossiliferous Limestone (Murchisonia/Gastropod Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossil-bearing limestone
Bioclastic limestone, likely containing a brachiopod or bivalve imprint
fossil
Chert with Fossil inclusions
Microcrystalline Quartz (SiO2) with biogenic inclusions
sedimentary
Fossil Shell in Sedimentary Matrix
Bivalvia (fossil) in Calcium Carbonate Matrix
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone containing a Brachiopod or Mollusk Impression
Biogenic Sedimentary Rock / Fossiliferous Limestone
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Pycnodonte Oyster
Pycnodonte (Gryphaeostrea) species; Composition is Calcium Carbonate (Calcite/Aragonite)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2)
sedimentary
Rounded river cobble, likely weathered sandstone or siltstone
Quartz-rich clastic sedimentary rock; exact identification requires a fresh surface and testing
sedimentary
Agate with Fossil/Inclusion
Silicon Dioxide (SiO2) with chalcedony and potential fossil inclusion
sedimentary
Fossilized Brachiopod/Bivalve in Limestone
Brachiopoda or Bivalvia fossil in Calcite/Limestone (CaCO3)
sedimentary
Fossiliferous Limestone
Sedimentary Limestone (CaCO3) containing Crinoid or Brachiopod remains
fossil
Turritella Agate
Silicified Elimia tenera Fossil (SiO2)
sedimentary
Fossil shell fragment
Indeterminate molluscan bioclast, likely aragonite or calcite
fossil
Sandstone
Arenite (SiO2 primarily)
sedimentary
Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Sandstone
Arenite (typically SiO2 + others)
sedimentary