Calcite crystals

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	SEM image (430x) of pink corrosion residue (sample SW9) from the FN Survey (FN18) in the Southwestern Branch on the way to Big Sky camp. Image shows an overview of the trigonal calcium carbonate crystals. Photo by Spilde, Northup, and Boston.
	SEM image of pink corrosion reside (sample SW9) from the FN Survey (FN18) in the Southwestern Branch on the way to Big Sky camp. Image shows an overview of the trigonal calcium carbonate crystals. Photo by Spilde, Northup, and Boston.
	SEM image of closer view of crystals in the red wall rock near corrosion residues in EA Survey. Photo by Spilde, Northup, and Boston.
	SEM image of calcite crystals with porous, dissolved dolomite from gypsum sample from EY56 in the Western Borehole. Photo by Spilde, Northup, and Boston.
	EDS spectrum of large crystal in the inner wall rock at EY56 in the Western Borehole. EDS suggests the crystal is calcite. EDS of several locations within the inner wall rock at this location showed the same composition whether they were defined crystals or not. Some had a little more magnesium. Samples are Au-Pd coated. Analysis by Spilde, Northup, and Boston.

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