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QX3 Digital Image Gallery
Darkfield Illumination

Cretaceous Period Dinosaur Fossil

The photomicrographs below are reflected light darkfield images of several thin sections made from a dinosaur (unknown species) fossil from the Cretaceous period that was recovered in Argentina. The Cretaceous period began 144 million years ago and ended 65 million years ago, at the beginning of the period marking the start of dinosaur extinction. This was the last period of the Mesozoic Era, and the general dinosaur population increased during much of this period.

Cretaceous Period Dinosaur Fossil at 60x Magnification

Cretaceous Period Dinosaur Fossil at 60x Magnification

Cretaceous Period Dinosaur Fossil at 60x Magnification

Darkfield illumination digital images were captured using an Intel Play QX3 computer microscope modified for reflected light darkfield illumination. Oblique light was applied to the specimens using light pipes from a Dolan-Jenner Model 180 fiber optics illuminator containing a 150 watt projection lamp. The mixing chamber and diffusion screen were removed from the stage and a large piece of dark construction paper placed beneath the stage to avoid images of the paper being superimposed over the photomicrographs.


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