Weathered limestone
Calcite-rich limestone (CaCO₃), possibly fossiliferous
sedimentary
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Fossil gastropod in granite-like stone
Gastropoda indet.; enclosing rock likely polished granite or gneiss
fossil
Limestone with Fossil
Sedimentary limestone, calcium carbonate (CaCO3)
sedimentary
Ammonite Fossil
Ammonoidea
fossil
Fossilized Brachiopod
Phylum Brachiopoda (replaced by Calcite/CaCO3)
sedimentary
Fossilized Brachiopod
Phylum Brachiopoda (Calcium Carbonate/Silica replacement)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (SiO2 with Fe2O3)
sedimentary
Fossiliferous limestone
Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing fossil fragments—possibly coral or bryozoan
fossil
Fossilized Tooth Fragment
Vertebrate Fossil (Mammalia indet.)
fossil
Sandstone (likely Arkose or Quartz Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Limestone with Stylolites
Calcareous sedimentary rock (CaCO3)
sedimentary
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Brachiopod Fossil
Phylum Brachiopoda
fossil
Fossilized Shell
Invertebrate fossil (Bivalvia or Brachiopoda)
fossil
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Fossilized Echinoid Fragment (Calycinal/Boss Fossil)
Echinodermata fossil fragment
fossil
Shale or Slaty Mudstone
Argillaceous sedimentary rock
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Coal
Bituminous or sub-bituminous coal (carbonaceous rock)
sedimentary
Rugose Coral Fossil
Rugosa (Order) / Horn Coral
fossil
Weathered limestone or calcitic fossil fragment
Calcite-rich carbonate rock; primarily CaCO₃
sedimentary
Fossiliferous limestone pebble
Calcite-rich limestone (primarily CaCO₃), with possible fossil or fossil-fragment patterns
sedimentary
Fossiliferous limestone
Calcite-rich limestone (CaCO₃), possibly coral or shell-bearing
sedimentary
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Fossil Shell
Phylum Mollusca (Bivalvia or Brachiopoda)
fossil
Fossilized bone, likely a large vertebrate limb or rib fragment
Petrified bone; exact taxon indeterminate from the image
fossil
Petrified Wood
Silicified Wood (SiO2)
mineral
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Polished fossil bone fragment
Fossilized bone, likely mammalian or reptilian; exact taxon cannot be determined from the image
fossil
Fossilized Echinoid (Sea Urchin) or Brachiopod
Echinoidea / Invertebrate Fossil
fossil
Fossilized Brachiopod or Gastropod in Chert/Limestone
Phylum Brachiopoda / Mollusca
fossil
Chert (Jasper / Flint Variant)
Microcrystalline Quartz (SiO2)
sedimentary
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Fossiliferous Shale
Sedimentary Clastic Rock with fossil inclusions (likely Brachiopod or Bivalve impressions)
fossil
Weathered sandstone pebble
Quartz-rich sandstone, commonly arkose or lithic sandstone
sedimentary
Fossilized Ripple Marks or Stromatolite
Sedimentary ripple mark imprint / Biosedimentary structure
fossil
Chert with Crinoid Fossil Impression
Microcrystalline Quartz (SiO2) with Crinoidea fossil impression
sedimentary
Turritella Fossil
Turritella (Class Gastropoda, Family Turritellidae)
fossil
Polished fossiliferous limestone, possibly ammonite-bearing
Calcite-rich limestone (CaCO₃), with visible fossil or shell fragments
fossil
Gastropod Internal Mold (Steinkern)
Class Gastropoda fossil mold (Phylum Mollusca)
sedimentary
Sandstone (with carbonaceous plant fragments)
Arenite (composed primarily of SiO2)
sedimentary
Fossilized Bone (Petrified Bone)
Permineralized Bone Fossil
fossil