Redstone, as it has been called for an indefinite number of years, is a conspicuous hill of quartzitic rock in the valley of the Minnesota river, midway between the towns of New Ulm and Courtland. The aim of this paper is to describe, geologically, this Redstone and the region which immediately surrounds it. The name Redstone, as used here, has never been employed as a geological formational name, and in the present paper it will be used for the particular hill, Redstone, while the term Courtland quartzite is the geologic formational name of the same rock. The old village of Redstone, which stands at the foot of the quartzite hill, has taken its name from that of the rock, rather than the name of the rock from that of the village.

The Redstone quartzite outcrops in an area of about 2 square miles east of the village of Redstone, . . .

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