Fossil

Crinoid Stem Fossil in Matrix

Phylum Echinodermata, Class Crinoidea

Chert with Fossil Brachiopod

Microcrystalline Quartz (SiO2) with Calcitic Brachiopod inclusion

Fossiliferous limestone

Bioclastic carbonate rock; predominantly calcite (CaCO₃), with fossil shell fragments

Sedimentary Outcrop (Sandstone/Shale)

Sedimentary bedrock formation (variable composition)

Crinoid Stem Fossils (Indian Beads / St. Cuthbert's Beads)

Crinoid columnal ossicles (phylum Echinodermata)

Weathered limestone pebble

Limestone, predominantly calcite (CaCO₃), possibly fossiliferous or oolitic

Weathered fossiliferous sandstone or mudstone cobble

Lithified siliciclastic sediment; the raised curved feature may be a trace fossil or shell impression

Weathered limestone or calcareous sandstone

Calcite-rich carbonate rock, chiefly calcium carbonate (CaCO₃), possibly fossiliferous limestone

Fossilized Crinoid Stem in Limestone

Crinoidea (Class) in Calcium Carbonate (CaCO3) matrix

Fossiliferous Limestone

Limestone with embedded fossil cross-section

Likely vertebra fossil or bone fragment

Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

Fossiliferous Limestone (or Bryozoan/Coral Fossil Pebble)

Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)

Fossiliferous Limestone with Crinoid stems

Limestone (CaCO3) containing Crinoidea fossils

Crinoid Fossil in Limestone

Crinoidea fossil (stalk segments) in Calcium Carbonate (CaCO3) matrix

Fossiliferous Limestone

Fossiliferous Calcilutite / Biomicrite

Possible fossilized bone fragment

Fossil bone, composition primarily carbonate-hydroxylapatite [Ca₅(PO₄)₃(OH)]

Fossilized Shark Tooth

Chondrichthyes (Class) fossil

Fossiliferous Limestone

Biogenic Limestone with Brachiopod/Crinoid fragments

Fossilized Gastropod in Limestone

Gastropoda (Class) in Fossiliferous Limestone

Polished fossiliferous limestone, likely crinoidal or coral limestone

Calcite (CaCO₃), fossiliferous carbonate rock

Fossilized Coral

Cnidaria (Hexacorallia)

Fossilized Shark Tooth (Partial) or Coprolite

Elasmobranchii (fossil) or Coprolite (trace fossil)

Fossil Shark Tooth

Carcharodon or Carcharias fossil (Vertebrate Fossil)

Polished fossil-bearing limestone

Fossiliferous micritic limestone, likely containing gastropod or ammonoid fragments

Fossiliferous Limestone with Rugose Coral

Calcium Carbonate (CaCO3) featuring Rugosa (extinct order of solitary and colony corals)

Fossil-bearing limestone

Bioclastic limestone, likely containing bivalve or brachiopod impressions

Horn Coral (Rugose Coral)

Order Rugosa (extinct)

Shark Tooth Fossil

Chondrichthyes fossil

Fossil Snail

Gastropoda fossil

Fossil Snail Shell (Embedded in Resin)

Gastropoda fossil

Seashell Fossil

Gastropoda fossil

Weathered limestone or calcitic fossil/reef fragment

Calcite-rich limestone (CaCO₃), possibly fossiliferous limestone

Fossilized bivalve or brachiopod fragment

Indeterminate fossil shell, likely calcitic or aragonitic carbonate

Fossil coral (likely colonial/tabulate coral)

Fossilized scleractinian or tabulate coral; calcium carbonate, chiefly CaCO₃ (calcite/aragonite replaced by calcite)

Fossilized Bivalve Shell

Class Bivalvia (fossilized)

Fossiliferous Concretion

Septarian Concretion containing Brachiopods/Crinoids

Fossilized Gastropod Internal Mold

Steinkern (Mollusca: Gastropoda)

Fossil Shark Tooth

Selachii fossil

Crinoid Stem Fossil in Chert

Crinoid columnal ossicles (phylum Echinodermata) embedded in microcrystalline quartz (chert)

Crinoid Stalk in Limestone

Crinoid fossil in Biomicrite (Limestone)

Fossiliferous Limestone

Calcium carbonate matrix with macrofossils (CaCO3)

Fossilized Shark Tooth (likely Sand Tiger Shark)

Carcharias taurus (fossilized hydroxyapatite/calcium phosphate)