Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate with Fossils)
sedimentary
Category
Sedimentary (Biogenic Sediment Or Biological Remain)
Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.
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Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Fossil Coral
Coral Limestone (a type of biogenic sedimentary rock)
Sedimentary
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Stromatolite
Biogenic Sedimentary Rock (Lithified microbial mat)
sedimentary
Chalk (Calcitic)
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Stromatolite
Laminated biogenic sedimentary structure (formed by Cyanobacteria)
sedimentary
Weathered sandstone (probable)
Quartz-rich sandstone, largely composed of cemented quartz grains (SiO₂)
sedimentary
Chert (containing Fossil Inclusions)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (with Lichen)
Arenite (composed primarily of SiO2)
sedimentary
Coquina or Fossilized Shell Fragment
Calcium Carbonate (CaCO3) / Biogenic Limestone
sedimentary
Fossil Shark Tooth
Carcharocles or Lamniformes (order)
fossil
Chert (with Chalky Cortex)
Silicon Dioxide (SiO2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Vesicular Limestone with Borings
Fossiliferous Calcarenite (Calcium Carbonate, CaCO3)
sedimentary
Chert (and/or Chalcedony)
Silicon dioxide (SiO2)
sedimentary
Fossilized bivalve shell
Bivalvia (likely a venerid or similar clam); shell composed mainly of CaCO₃ as aragonite/calcite
fossil
Fossilized Shark Tooth
Fossil Chondrichthyes (various genera such as Carcharias or Odontaspis)
sedimentary
Chert (Banded)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Fossiliferous Limestone
Fossiliferous Calcarenite (CaCO3)
sedimentary
Fossiliferous Limestone
Fossiliferous Calcite (CaCO3)
sedimentary
Coquina (Fossiliferous Limestone)
Biogenic Limestone (mostly CaCO3 / Calcium Carbonate)
sedimentary
Fossilized Brachiopod
Brachiopoda (likely Order Spiriferida or Productida)
fossil
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (primarily SiO2)
metamorphic
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock / CaCO3 with fossil fragments
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Crushed Limestone
Calcium Carbonate (CaCO3)
sedimentary