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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Paleoenvironmental Significance of Carbon Isotopic Composition of Siderite Nodules in Some Shales of Pennsylvanian Age
J. N. Weber, E. G. Williams, M. L. Keith
ABSTRACT
Analysis of C13/C12 ratios of penecontemporaneous siderite nodules from shales showed complete separation of the freshwater group from the two marine groups, and a partial separation of restricted marine and marine. Some of the anomalous results can be explained by contamination by secondary calcite and possible errors of environmental classification.
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