sedimentary

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

AI-generated identification · may be incorrect

Hardness: Variable (matix is 3-6 Mohs, teeth are 5-6 Mohs); Color: Tan, grey, and dark brown matrix with black or grey enameled teeth; Luster: Dull/Earthy matrix with Vitreous (glassy) fossils; Structure: Clastic with poorly sorted rounded fragments.

Hardness: Variable (matix is 3-6 Mohs, teeth are 5-6 Mohs)
Luster: Dull/Earthy matrix with Vitreous (glassy) fossils

Identified March 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed in a high-energy marine or coastal environment where sediments and biological remains were quickly deposited and lithified. Many such specimens date to the Cretaceous or Paleogene periods (approx. 50-100 million years old).

Uses & applications

Primary use is for educational purposes, paleontological study, and as a fossil collector's specimen. Larger conglomerate deposits are used as aggregate in construction.

Geological facts

This specimen is specific to 'bone beds' where ocean currents naturally aggregate heavy materials like teeth and pebbles in underwater depressions before they are buried and turned into stone.

Field identification & locations

Identify in the field by looking for smooth, dark, glossy shapes (teeth) embedded within a rough, multi-colored stony matrix. Commonly found in riverbeds or coastal cliffs in regions like the Atlantic Coastal Plain (e.g., Maryland, North Carolina).