28 August 1992
Vol 257, Issue 5074

About The Cover

False-color, three-dimensional density map of a sample of pelitic schist from British Columbia, Canada, generated from high-resolution computed x-ray tomography images. The sizes and relative positions of the large garnet crystals (red orbs) provide clues about the atomic-scale mechanisms that govern metamorphic recrystallization. See page 1236. [Image: Cambria Denison]