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Title: The Ibexian, lower most series in the North American Ordovician with a section on echinoderm biostratigraphy
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Author(s): Ross, R.J., Hintze, L.F., Ethington, R.L., Miller, J.F., Taylor, M.E., Repetski, J.E., Sprinkle, James, and Guensburg, T.E.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Professional Paper 1579 [p. 1-50]
- Publication Date: 1997
- Map Scale: 1:24,000
- Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.