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Quartzite can have a grainy, glassy, sandpaper-like surface. Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. [1] [2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.
The unit is a thick sequence of massive quartzite beds, white to reddish or tan in color, 2 to 7 feet (0.6 to 2 m) thick. There are also scattered beds of sericite schist that become more numerous in the uppermost part of the formation, where the quartzite beds thin to 1 to 2 feet (0.3 to 0.6 m) in thickness and the beds are reddened by hematite.
Van Hise Rock is a rock monolith located along Wisconsin Highway 136 near Rock Springs, Wisconsin.The rock is a geologically significant outcropping of Baraboo Quartzite.. It serves as a monument to Charles Van Hise, a prominent Wisconsin geologist who studied the area extensively. [3]
The Chickies Formation is described as a light-gray to white, hard, massive quartzite and quartz schist with thin interbedded dark slate at the top. Included at the base is the Hellam Conglomerate Member. It is a rare metamorphic rock that has fossils; Skolithos is found throughout the formation. [1]
The White Wall [1] (German: Weiße Mauer) in the Taunus is a quartzite field on the Altkönig that was formed in the ice age as a result of frost weathering. It lies at a maximum elevation of 634 m above sea level (NHN) [ 2 ] near Oberursel in the Hessian county of Hochtaunuskreis in Germany.
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