Rock Identifier
Fossil Ray Tooth Plate (Myliobatis sp. (Chondrichthyes, Myliobatidae)) — fossil
fossil

Fossil Ray Tooth Plate

Myliobatis sp. (Chondrichthyes, Myliobatidae)

AI-generated identification · may be incorrect

Mohs hardness 4–5; tan to creamy-white; dull to sub-vitreous luster; comprised of parallel, enameloid crushing bars (pavement teeth) with porous dentine structure beneath.

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Physical properties

Mohs hardness 4–5; tan to creamy-white; dull to sub-vitreous luster; comprised of parallel, enameloid crushing bars (pavement teeth) with porous dentine structure beneath.

Formation & geological history

Formed through biomineralization and subsequent permineralization in shallow, warm marine environments, commonly dating from the Cretaceous to the Pleistocene.

Uses & applications

Prized as paleontological specimens, educational display pieces, and entry-level fossils for private collectors.

Geological facts

These interlocking, washboard-like dental plates were used by prehistoric eagle rays to crush hard-shelled prey such as mollusks and crustaceans.

Field identification & locations

Identifiable by its distinct ribbed, parallel lamellae structure; commonly found in coastal marine sediments, river gravels, and phosphate deposits worldwide.

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