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Penokean orogeny
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Penokean orogeny

geology

Learn about this topic in these articles:

extension of Hudsonian orogeny

  • In Hudsonian orogeny

    … in South Dakota, and the Penokean orogeny in the southern part of the Lake Superior region may represent the Hudsonian event in the United States. Precambrian rocks in the Southern Province, which extends south-southwest of Lake Superior into the mid-continental United States, also are dated in the Hudsonian time span.

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