Fossil

Sandstone Pebble

Sedimentary Rock (Quartzose Sandstone)

Polished fossil coral pendant

Agatized or silicified colonial coral; commonly sold as fossil coral jasper

Fossil Coral

Rugose Coral / Hexagonaria (CaCO3)

Fossiliferous Sandstone

Sedimentary rock containing invertebrate fossils

Fossiliferous Sedimentary Rock

Sedimentary Rock with Invertebrate Fossil Imprint

Fossilized wood or bone fragment

Indeterminate permineralized organic fossil; possibly silicified wood or fossil bone

Likely fossiliferous limestone fragment

Calcite-rich limestone, possibly containing fossil or shell fragments (primarily CaCO₃)

Fossil brachiopod shell

Brachiopoda; exact genus and species cannot be determined from the image

Bivalve Seashell Fossil

Class Bivalvia

Sandstone with Trace Fossils

Quartz Arenite with Bioturbation (Trace Fossils)

Likely fossiliferous limestone

Calcite-rich limestone, mainly calcium carbonate (CaCO₃); exact identification requires closer examination

Likely fossiliferous limestone fragment

Calcitic limestone, chiefly calcium carbonate (CaCO₃; mineral calcite)

Fossiliferous sandstone with plant fossils

Likely fossil-bearing siliciclastic sedimentary rock; apparent fragments may be fossil wood or leaf impressions, but species cannot be determined from the image

Fossilized Tooth Fragment

Vertebrate Fossil (Mammalia indet.)

Shark Tooth Fossil

Elasmobranchii fossil (likely Carcharias or Odontaspis sp.)

Petrified Wood

Silicified Wood (SiO2)

Fossilized Brachiopod or Gastropod in Chert/Limestone

Phylum Brachiopoda / Mollusca

Fossil Shell (Bivalve)

Class Bivalvia (fossilized)

Fossilized Bone

Fossilized Vertebrate Bone (Per mineralized)

Fossilized Shark Tooth

Chondrichthyes (Class) - likely Carcharodon or Otodus genus

Fossilized Crinoid Stem in Pebble

Crinoidea (Class) preserved in calcite/matrix

Shark Tooth Fossil

Chondrichthyes (class) fossilized tooth

Fossilized Brachiopod in Limestone

Phylum Brachiopoda embedded in sedimentary limestone

Sand Tiger Shark Tooth

Carcharias taurus

Gastropod Fossil (Snail Internal Cast)

Class Gastropoda (Steinkern)

Fossiliferous Limestone

Biogenic Calcium Carbonate (CaCO3)

Chert Cobble with Crinoid Fossil

Silica (SiO2) with Crinoid ossicle

Weathered limestone or dolostone

Micritic limestone, primarily calcite (CaCO₃), possibly dolomite (CaMg(CO₃)₂)

Fossilized shark tooth

Fossil shark tooth; exact shark species cannot be determined from this image

Fossiliferous Limestone

Fossiliferous Limestone

Fossil Brachiopod

Phylum Brachiopoda

Ammonite Fossil

Ammonoidea

Fossil Shell

Phylum Mollusca (Gastropod fossil)

Chert with Crinoid Fossil Impression

Microcrystalline Quartz (SiO2) with Crinoidea fossil impression

Fossil ammonite

Ammonite (subclass Ammonoidea; exact species not identifiable from the image)

Ammonite Fossil

Ammonoidea subclass (calcium carbonate / silica replacement)

Fossiliferous limestone pebble

Calcite-rich limestone (primarily CaCO₃), with possible fossil or fossil-fragment patterns

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossil oyster shell

Fossilized bivalve, likely an oyster (family Ostreidae); exact genus and age are indeterminable from the image

Goniatite Fossil

Order Goniatitida

Ironstone Concretion

Ironstone (primarily Siderite or Limonite / Goethite, FeO(OH)·nH2O)

Crinoid Stem Fossil

Crinoid columnal (Echinodermata)