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20130221_6204 | by MostlyDross
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20130221_6204

Fossilized tooth of extinct Mako Shark, 28mm x 39mm, washed from Miocene cliffs along the Potomac River, Westmoreland State Park, Virginia. Oblique illumination with 13 watt Ott desk lamp with a sheet of white paper used for shadow fill. Nikon D7000, Micro-Nikkor-P.C 55mm f/3.5 AI @ f/8, ISO 100, -2EV, 0.8 sec for each of four images focus-stacked with CombineZP (macro: Pyramid Do Stack).

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Taken on February 21, 2013