First record of the Hirnantian (Upper Ordovician) 13C excursion in the North American Midcontinent and its regional implications

S. M. Bergstrom, M. M. Saltzman, and B. Schmitz

2006

Article

Geological Magazine 143(5):657-678

Find it at:

http://dx.doi.org/10.1017/S0016756806002469