Rock Identifier
Fossilized Shark Tooth in Matrix (Otodus obliquus (Chondrichthyes: Lamniformes)) — fossil
fossil

Fossilized Shark Tooth in Matrix

Otodus obliquus (Chondrichthyes: Lamniformes)

AI-generated identification · may be incorrect

Hardness: 5 (tooth enamel/apatite); Color: Tan crown with creamy white to yellowish root; Luster: Vitreous on crown, earthy on matrix; Structure: Triangular blade with lateral cusplets; Matrix: Calcareous sedimentary rock.

Hardness
5 (tooth enamel/apatite)
Color
Tan crown with creamy white to yellowish root
Luster
Vitreous on crown, earthy on matrix
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Physical properties

Hardness: 5 (tooth enamel/apatite); Color: Tan crown with creamy white to yellowish root; Luster: Vitreous on crown, earthy on matrix; Structure: Triangular blade with lateral cusplets; Matrix: Calcareous sedimentary rock.

Formation & geological history

Formed during the Paleocene to Eocene epochs (approx. 40-60 million years ago) in marine environments. The specimen was preserved through permineralization in ocean floor sediments.

Uses & applications

Scientific research, paleontological study, educational tools, and highly popular as collector specimens.

Geological facts

Otodus obliquus was a massive prehistoric mackerel shark and is considered an ancestor of the Carcharodon megalodon. These teeth are frequently found in the phosphate mines of Morocco.

Field identification & locations

Identified by the distinct triangular shape and presence of small 'cusplets' at the base of the crown. Commonly found in Morocco, USA (East Coast), and Belgium. Collectors should look for intact roots and sharp enamel.

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