fossil

Mosasaur Tooth Fossil

Mosasaurus sp.

AI-generated identification · may be incorrect

Mohs hardness around 5 for fossilized enamel/dentin, brown to dark gray/black coloration, vitreous to dull luster, embedded in a limestone or sandstone matrix.

Identified July 30, 2026More fossil →

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Physical properties

Mohs hardness around 5 for fossilized enamel/dentin, brown to dark gray/black coloration, vitreous to dull luster, embedded in a limestone or sandstone matrix.

Formation & geological history

Formed during the Late Cretaceous period (approximately 70 to 66 million years ago) through permineralization, where organic bone and tooth material were replaced by minerals in marine sedimentary environments.

Uses & applications

Used primarily for educational purposes, fossil collecting, and display specimens.

Geological facts

Mosasaurs were massive marine reptiles, apex predators of the Late Cretaceous seas, and are closely related to modern monitor lizards and snakes.

Field identification & locations

Found commonly in phosphate deposits, particularly in Morocco, as well as parts of North America and Europe. Identified by the robust, conical, and slightly curved shape of the tooth embedded in sedimentary rock.