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Van Hise Rock : ウィキペディア英語版 | Van Hise Rock
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.〔http://www.wisconsinhistory.org/hp/register/viewSummary.asp?refnum=97001267〕 The rock was declared a National Historic Landmark in 1997.〔〔 and 〕 ==Description==
Van Hise Rock is made of Baraboo quartzite, a type of pink-purple quartzite found in south central Wisconsin. It is one of the best-exposed parts of the Baraboo Range, a ring of quartzite hills that passes through Columbia and Sauk Counties. The quartzite in the range was formed as sandstone during the Precambrian Supereon; then a greenschist phase changed it to quartzite. The monolith is located in a wayside on Wisconsin Highway 136, about 3/4 mile north of the intersection with Wisconsin Highway 154 near the village of Rock Springs. The wayside provides visitor access to the rock.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Van Hise Rock」の詳細全文を読む
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