The Precambrian nonesuch formation of the North American mid-continent rift, sedimentology and organic geochemical aspects of lacustrine deposition

@inproceedings{Elmore1989ThePN,
  title={The Precambrian nonesuch formation of the North American mid-continent rift, sedimentology and organic geochemical aspects of lacustrine deposition},
  author={Richard D. Elmore and Gary J. Milavec and Scott W. Imbus and Michael H. Engel},
  year={1989}
}
Abstract The Precambrian Keweenawan Trough in the Lake Superior region of North America is part of a failed intractonic rift that is filled with a thick sequence of volcanic and sedimentary rocks. One unit in this sequence, the None-such Formation, is composed of black-to-green siltstones and shales and is conformable with the underlying alluvial Copper Harbor Conglomerate and the overlying fluvial Freda Sandstone. The formation is exposed as a lens in northern Michigan and Wisconsin and… CONTINUE READING

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