Micro shark teeth from a New Jersey well drilling.

Shark teeth through the looking glass. Well drillings can provide a micro-sized snap shop into fossil formations not available on the surface. This well drilling in Richwood, New Jersey punched into the Cretaceous Mount Laurel/Navesink Formation more than 100 feet below the surface.

Tiny fossil obtained through a well drilling

The fossils were carefully sifted with window screen from the glauconite-rich "green sand" brought to the surface. Fossils in the sample included shark teeth, shark and ecinoderm spines, encodus fish teeth and dermal denticles.

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