Rock Identifier
Fossil Shark Tooth (Phylum Chordata, Class Chondrichthyes (Possibly Cretalamna or Otodus)) — fossil
fossil

Fossil Shark Tooth

Phylum Chordata, Class Chondrichthyes (Possibly Cretalamna or Otodus)

AI-generated identification · may be incorrect

Hardness: 5 (Enamel); Color: Cream, tan, or light brown; Luster: Dull to vitreous; Structure: Triangular or peg-like crown with a bony root

Hardness
5 (Enamel)
Color
Cream, tan, or light brown
Luster
Dull to vitreous
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Physical properties

Hardness: 5 (Enamel); Color: Cream, tan, or light brown; Luster: Dull to vitreous; Structure: Triangular or peg-like crown with a bony root

Formation & geological history

Formed through permineralization where hydroxyapatite in the tooth is replaced or stained by surrounding minerals in marine sediments; typically Cretaceous to Paleogene period

Uses & applications

Scientific study, educational collecting, and unique jewelry items

Geological facts

Sharks can lose tens of thousands of teeth in a lifetime, making their teeth the most common vertebrate fossils found worldwide

Field identification & locations

Identify by the distinct enamel-covered crown and porous root structure; commonly found in riverbeds and coastal areas with exposed sedimentary layers

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Bioclastic limestone, composed chiefly of calcite (CaCO₃)

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Likely micritic limestone or calcareous sandstone

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