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Scanning electron microscope (SEM) photograph of a mold made from a bored bone surface at Carnegie Quarry, Dinosaur National Monument, Utah. Notice the semispherical (hemispherical) shape of the borings and the scratch marks along the surface of the borings that run as lines of longitude within these hemispheres. The bone surface represents a slightly bored surface. These hemispheres are approximately one millimeter in diameter. The SEM bar scale is 100 microns.

Scanning electron microscope (SEM) photograph of a mold made from a bored bone surface at Carnegie Quarry, Dinosaur National Monument, Utah. Notice the semispherical (hemispherical) shape of the borings and the scratch marks along the surface of the borings that run as lines of longitude within these hemispheres. The bone surface represents a slightly bored surface. These hemispheres are approximately one millimeter in diameter. The SEM bar scale is 100 microns.

Context in source publication

Context 1
... the bone surfaces, the plan-view shapes of the borings are predominantly circular, but elliptical borings are also present. They are preserved as molds (actual boring) and casts (fine-grain fill) within the bone and are shallow hemispheres (see figure 3) typically 0.01 to 4.0 mm in depth. On some of the bones, a few elliptical pits appear to be unfinished borings. ...

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