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Tower Hill State Park
Tower Hill State Park is a state park of Wisconsin, United States, which contains the reconstructed Helena Shot Tower. The original shot tower was completed in 1832 and manufactured lead shot until 1860. It was added to the National Register of Historic Places in 1973.〔 The park abuts the Wisconsin River and is bordered by state-owned land comprising the Lower Wisconsin State Riverway.
==Natural history==
The bluffs along the Wisconsin River are formed of Jordan Sandstone. The park lies within the Driftless Area, a region of the American Midwest that remained ice-free through three successive ice ages.〔 In the 19th century the Wisconsin River flowed directly past the base of the bluffs. The river has since shifted slightly, and a stream known as Mill Creek marks the northern boundary of the park.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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