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Pages 58-58

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From page 58...
... for the late Cenomanian-early Turonian mass extinction interval as preserved along the north cut face of the Arkansas River where it breaches the Rock Canyon Anticline just west of Pueblo, Colorado. This locality is the standard reference section for the Greenhorn cyclothem (Scott, 1964, 1969; Cobban and Scott, 1972; papers in Pratt, 1985)


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