“Euhedral graphite crystal perched on the edge of a larger graphite crystal that is actually a columnar graphite overgrowth (8 micron) on yet a larger (1.9 mm wide) graphite host crystal. These graphite crystals with overgrowths were dissolved from friable calcite marble from a roadcut north of Olmstedville. The image is a composite of 2 stacked images from a Hitachi field emission scanning electron microscope (S-4700).”

“Columnar graphite overgrowth (8 micron) on yet a larger (1.9 mm wide) graphite host crystal. These graphite crystals with overgrowths were dissolved from friable calcite marble from a roadcut north of Olmstedville. The image is a composite of 2 stacked images from a Hitachi field emission scanning electron microscope (S-4700).”

“1.9 mm wide graphite crystal hosting columnar and euhedral graphite overgrowths. These graphite crystals with overgrowths were dissolved from friable calcite marble from a roadcut north of Olmstedville. The image is a composite of 2 stacked images from a Hitachi field emission scanning electron microscope (S-4700).”