Links to 768x512, 192K JPG . J.C. Tinsley, U.S. Geological Survey.
Vented sand contains marine-shell fragments.
Links to 512x768, 224K JPG . J.C. Tinsley, U.S. Geological Survey. Astronaut Carl Walz installs MGM test cell on STS-79. Operations on STS-89 will be essentially the same. Links to 1536x1052-pixel, 416K JPG .