Sioux Quartzite Rock Quarry

USA / Minnesota / Jeffers /
 quarry, sandpit (quarry)
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Sioux Quartzite mined at this location.

This colorful metamorphosed sandstone is used for landscape stone, construction material, railroad beds, cut stone, poultry grit, abrasive products, and industrial applications.

Sioux Quartzite was formed as a result of ancient volcanic activity. The Penokean volcanic mountains eroded, producing deposits of quartz sand grains now found in the thick Sioux Quartzite of southwestern Minnesota, dating from about 1,600 million years ago.
Wikipedia article: http://en.wikipedia.org/wiki/Quartzite
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Coordinates:   44°5'1"N   95°3'54"W
This article was last modified 15 years ago