Late-Middle Ordovician Environmental Change: Molecular and Isotopic Evidence from North America

R. D. Pancost, K. H. Freeman and M. E. Patzkowsky

Department of Geosciences, The Pennsylvania State University, University Park, PA 16802, USA

Mineralogical Magazine; 1998 v. 62A; no. 2; p. 1133-1134; DOI: 10.1180/minmag.1998.62A.2.259
© 1998, The Mineralogical Society
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