A Baraboo Quartzite sample, in breccia form. The brecciated purple portions are quartzite, and the matrix is white quartzA sample of Baraboo Quartzite.
Baraboo Quartzite is a Precambrian geological formation[1] of quartzite, found in the region of Baraboo, Wisconsin. While pure quartzite is usually white or gray, Baraboo Quartzite is typically dark purple to maroon in color, due to the presence of iron (hematite) and other impurities.[2] Baraboo Quartzite may display strata created by progressive deposition of layers of sand in the original sandstone from which the quartzite was formed (through metamorphism).[2] Specimens of Baraboo quartzite may also display ripple marks that appear visually similar to the patterns one might see in the sand at a beach. Ripples indicate that the sandstone from which the quartzite was metamorphosed was originally water-laid sediment.[2]
Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.
^Hanson, G. F., Geology of the Barabou District, Wisconsin Archived February 22, 2014, at the Wayback Machine, The University of Wisconsin Extension, 1970, Information Circular 14
^ abcMontgomery, Keith. "Baraboo Quartzite". Archived from the original on 2010-09-20. Retrieved 2013-10-14.
BarabooQuartzite is a Precambrian geological formation of quartzite, found in the region of Baraboo, Wisconsin. While pure quartzite is usually white...
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into quartzite, deformed, then uplifted. These outcrops may have been islands when the region was covered by shallow seas in the Cambrian. The Baraboo River...
Nebraska. It is correlated with other sandstone and quartzite units across Wisconsin (at Rib Mountain, Baraboo, Barron, Waterloo, and Flambeau), southeastern...
form much of Wisconsin's unique deposits. Much of the Baraboo Range consists of BarabooQuartzite, and other Precambrian metamorphic rock. During the Pleistocene...
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underlying Sevilleta metarhyolite, suggesting that the sediments of the quartzite were weathered almost exclusively from local sources. The minimum zircon...
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emplaced in south-central Wisconsin. The Baraboo and Waterloo Quartzite in the south and the Barron Quartzite in the northwest are slightly younger, along...
the east, the Baraboo Range, an ancient, profoundly eroded monadnock in south central Wisconsin, consists primarily of Precambrian quartzite and rhyolite...
Rib Mountain to the northeast and the Baraboo Hills to the south, and much older than the Himalayas. The quartzite is pretty pink, a semi-precious stone...
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