Saltzman et al. (2000) presented an impressive data set showing a pronounced positive excursion in carbon-isotope values that commences in the upper Kinderhookian upper Siphonodella isosticha conodont zone within a limestone section in southern Nevada. They proposed that this isotopic anomaly might correlate with the Antler orogeny, development of the Antler foreland, and sequestration of organic carbon in the sedimentary fill of this foreland. This interpretation is not supported, however, by the nature and age of the initial Mississippian deposits in the typical part of this foreland in Nevada and Utah that is adjacent to the trace of the type...

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