Moses Butte is in southern Shoshone County, 35 miles SSE of Wallace. The Butte is gneiss; the south side has a zone with large coarse ugly, rounded almandine up to about 8 inches across (bowling balls weathered out scattered amongst the grass); the north ridge has a lot of kyanite in the gneiss and some large pods of white anorthosite which has these streaks of reddish pink almandine, crystals mostly less than 3/8 inch, but up to more than an inch.
The poor quality almandine of the typical color for the region (dark purplish red to nearly black) does also occur along the road, and below the zone with the pink crystals in anorthosite in steep exposures of gneiss. It also occurs in large boulders in the trees just above the road to the south of that. In those boulders, the almandines have inclusions of kyanite. Unfortunately, all those almandines in the gneiss along Moses Butte are rounded granular beasts.
Mineral List
5 entries listed. 4 valid minerals.
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