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Unmetamorphosed sedimentary rocks are found in the rock record from the Cambrian, in the early Paleozoic.The feldspathic quartz sandstone and orthoquartz sandstone of Chequamegon, Devils Island and Orienta formations make up the Bayfield Group which underlies the entire Lake Superior shoreline of the state from Chequamecon Bay to the St. Louis River in the west.
Dells of the Wisconsin River. The Dells of the Wisconsin River, also called the Wisconsin Dells (from Old English “dæl”, modern English “dale”), meaning “valley”, is [1] a 5-mile (8-km) gorge on the Wisconsin River in south-central Wisconsin, USA. It is noted for its scenery, in particular for its Cambrian sandstone rock formations ...
This is a list of National Historic Landmarks in the U.S. state of Wisconsin.National Historic Landmarks are designated by the U.S. National Park Service, which recognizes buildings, structures, districts, objects, and sites which satisfy certain criteria for historic significance.
The earliest references to strata now referred to as Jordan were made by many of the pioneering geologists of the upper Midwest. In an 1852 report on the geology of Wisconsin, Iowa, and Minnesota, D. D. Owen assigned it to the uppermost part of his “Lower Sandstone” (the “Upper Sandstone” referring to what is now called the St. Peter). [8]
Glacial Lake Wisconsin 20,000 years ago with modern counties for geographical context. Glacial Lake Wisconsin was a prehistoric proglacial lake that existed from approximately 18,000 to 14,000 years ago, at the end of the last ice age, in the central part of present-day Wisconsin in the United States.
Baraboo Range in winter Looking east down the range on Wisconsin Highway 78. The Baraboo Range is a mountain range in Columbia County and Sauk County, Wisconsin. Geologically, it is a syncline fold consisting of highly eroded Precambrian metamorphic rock. It is about 25 miles (40 km) long and varies from 5 to 10 miles (16 km) in width.
The Wisconsin River is a tributary of the Mississippi River in the U.S. state of Wisconsin.At approximately 430 miles (692 km) long, it is the state's longest river. The river's name was first recorded in 1673 by Jacques Marquette as "Meskousing" from his Indian guides - most likely Miami for "river running through a red place."
The Ice Age National Scientific Reserve is an affiliated area of the National Park System of the United States comprising nine sites in Wisconsin that preserve geological evidence of glaciation. To protect the scientific and scenic value of the landforms, the U.S. Congress authorized the creation of a cooperative reserve in 1964.