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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. (en)
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- North American Middle Ordovician impact craters, which may be part of the Ordovician meteor event. Key: 1: Ames crater, 2: Decorah crater, 3: Rock Elm Disturbance, 4: Slate Islands crater. (en)
- Aerial photo of Decorah and the extent of the crater (en)
- U.S. Geological Survey aerial resistivity map of the Decorah, Iowa area, showing the Decorah Impact Structure. (en)
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- Middle Ordovician craters.jpg (en)
- Decorah crater ARHIOWA00118726.jpg (en)
- USGS Decorah crater.jpg (en)
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- Location of the crater in the United States (en)
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- Location of Decorah crater on bedrock map of Iowa (en)
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- 43.31388888888889 -91.77222222222223
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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. (en)
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- POINT(-91.77222442627 43.313888549805)
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