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The Decorah crater, also called the Decorah impact structure, is a possible impact crater located on the east side of the city of Decorah in Iowa, United States. It is thought to have been caused by a meteor about 200 metres (660 ft) wide which struck during the Middle Ordovician Period, circa 470 million years ago.
Decorah is a city in and the county seat of Winneshiek County, Iowa, United States. The population was 7,587 at the time of the 2020 census . [5] Decorah is located at the intersection of State Highway 9 and U.S. Route 52 , and is the largest community in Winneshiek County.
The Winneshiek Shale (originally the Winneshiek Lagerstätte) is a Middle Ordovician ( Darriwilian -age) geological formation in Iowa. The formation is restricted to the Decorah crater, an impact crater near Decorah, Iowa. Despite only being discovered in 2005, the Winneshiek Shale is already renowned for the exceptional preservation of its ...
Although glaciation has erased all surface evidence of the impact, the bedrock associated with this impact is unique in Iowa. Decorah crater U.S. Geological Survey aerial resistivity map of the Decorah, Iowa area, showing the Decorah crater.
Vesterheim Norwegian-American Museum in Decorah, Iowa is the National Norwegian-American Museum and Folk Art School, with over 33,000 artifacts, 12 historic buildings, and a library and archives. This treasure showcases one of the most extensive collection of Norwegian-American artifacts in the world and highlights the best in historic and ...
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Iowa Flood of 2008. The Iowa flood of 2008 was a hydrological event involving most of the rivers in eastern Iowa which began June 8 and continued until July 1. Flooding continued on the Upper Mississippi River in the southeastern area of the state for many more days. The phrase "Iowa's Katrina " was often heard.
December 20, 1978. Decorah Ice Cave State Preserve has one of the largest ice caves in the Midwestern United States. [2] It consists of a 3-acre (1.2 ha) parcel of land at the edge of Barbara Barnhart VanPeenen Memorial Park in the northern portion of the city of Decorah, in Winnesheik County, Iowa . Ice Cave is open to the public as an 'enter ...