Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized Organic Matter) in the encyclopedia
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Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (Greensand)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Brachiopod Fossil (Spiriferid)
Phylum Brachiopoda, Order Spiriferida (CaCO3 - Calcium Carbonate)
sedimentary (fossilized organic remains)
Fossilized Coral (Petoskey Stone or similar Rugose Coral)
Hexagonaria percarinata (or similar Rugose/Tabulate coral)
fossil
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Quartzite Pebble (with mineral veining)
Metamorphic Quartzite (SiO2)
metamorphic
Ironstone Concretion (Limonite/Goethite)
Goethite/Limonite concretion (FeO(OH)·nH2O)
sedimentary
Basalt (with possible dendritic inclusions)
Extrusive mafic igneous rock
igneous
Fossilized Shark Tooth (Scapanorhynchus)
Scapanorhynchus texanus
fossil
Banded Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Fossilized shell or brachiopod
Likely a calcareous brachiopod or bivalve fossil; exact identification requires clearer detail and scale
fossil
Fossilized Horn Coral
Rugosa (Rugose coral)
fossil
Fossilized Shark Tooth
Elasmobranchii (tooth fossil, composed mainly of Bioapatite / Calcium Phosphate)
fossil
Fossilized bivalve shell
Bivalvia (likely a venerid or similar clam); shell composed mainly of CaCO₃ as aragonite/calcite
fossil
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
sedimentary
Limestone pebble
Sedimentary rock, primarily calcium carbonate (CaCO3)
sedimentary
Crinoid Stem Fossil
Crinoid columnal (Echinodermata)
fossil
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert Nodules in Sedimentary Rock
Microcrystalline Quartz (SiO2) within Clastic Matrix
sedimentary
Fossil Shell
Brachiopod or Mollusk fossil
fossil
Chert (Common Opal/Jasper mix)
Silicon Dioxide (SiO2) with impurities
sedimentary
Banded Chert
Silicon Dioxide (SiO2)
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Kimberlite
Kimberlite
igneous
Pink Orthoclase Feldspar with Dendrites
Orthoclase (KAlSi3O8) with Manganese Oxide dendrites
mineral
Dendritic Opal
Opalized Chalcedony with Manganese Inclusions (SiO2 · nH2O)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Shungite
Carbon-rich mineraloid (Amorphous carbon)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert / River Pebble
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Chert (Arrowhead Fragment)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral