Fossiliferous Sandstone (with Brachiopod or Bivalve mold)
Clastic Sedimentary Rock with Macrofossil Mold
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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Fossilized bone or tooth fragment
Indeterminate vertebrate fossil; likely permineralized bone, possibly a large mammal or marine vertebrate
fossil
Fossilized bivalve shell
Fossil Mollusca; likely a cemented or infaunal bivalve, possibly oyster or clam
fossil
Chert (containing fossil leaf impression)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Coquina
Biogenic Limestone
sedimentary
Fossiliferous Limestone (Coquina-like)
Biogenic Limestone
sedimentary
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Fossil tooth, likely shark tooth
Likely fossilized shark tooth (possibly a small lamniform shark; exact taxon cannot be confirmed from the image)
fossil
Likely fossilized shell or bone fragment
Indeterminate bioclast; possibly silicified/bioapatite-bearing shell or bone
fossil
Flint in Limestone (Chert Nodule)
Sedimentary rock containing microcrystalline quartz (SiO2) within a carbonate matrix
sedimentary
Stromatolite
Biogenic sedimentary rock / Stromatolite
sedimentary
Stromatolite
Biogenic sedimentary rock / Stromatolite
sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Fossilized Oyster Shell
Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)
sedimentary
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Petrified Wood
Silicified wood (principally Silicon Dioxide, SiO2)
sedimentary
Mookaite Jasper
SiO2
Sedimentary
Fossilized Echinoid
Echinoidea (likely of the order Echinoidea)
fossil
Banded chert (likely jasper/chalcedony-rich stone)
Microcrystalline quartz, SiO₂, with iron-oxide impurities
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossil ammonite fragment
Ammonoidea; likely a partial planispiral ammonite shell, commonly preserved as calcite or replaced limestone
fossil
Atlantic Calico Scallop (Biogenic Aragonite/Calcite)
Argopecten gibbus (Chemical: CaCO3)
mineral
Fossil mammalian skull
Fossilized vertebrate bone; exact taxon cannot be determined from the image
fossil
Weathered fossil shell fragment
Likely a bivalve or gastropod shell, composed mainly of biogenic calcite/aragonite (CaCO₃)
fossil
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossil shell fragment
Indeterminate mollusk shell; likely gastropod or bivalve, composed mainly of calcium carbonate (aragonite/calcite)
fossil
Fossil shark tooth
Likely a fossilized shark tooth, possibly *Carcharodon* or *Carcharhinus*; exact species requires provenance and close examination
fossil
Cleavable Calcite
Calcium Carbonate (CaCO3)
mineral
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Fossilized tooth, likely mammalian molar
Silicified or mineral-replaced mammalian tooth; exact taxon cannot be determined from the image
fossil
Chert (Jasper / Iron-stained Chert)
Microcrystalline Quartz (SiO2 with Fe-oxides)
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda embedded in sedimentary rock
fossil
Petrified wood
Silicified wood; commonly quartz (SiO₂) replacing original woody tissue
fossil
Fossiliferous Limestone Pebble
Biogenic Sedimentary Rock (CaCO3)
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
sedimentary
Stromatolite
Biogenic sedimentary structure (Stromatolite)
fossil
Fossiliferous Limestone (Gastropod / Crinoid Fossil Rock)
Biogenic Sedimentary Rock (CaCO3)
fossil
Coal
Biogenic sedimentary rock (Carbon)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Small weathered fossil or mineral fragment
Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral
fossil