The substance of this contribution is a comprehensive chart of Pennsylvanian rocks that undertakes to summarize present knowledge and judgment of classification and correlation of these Lat-Paleozoic strata, which most American geologists consider properly classifiable as a system. Evidence bearing on differentiation of major divisions and annotations explaining correlations are presented briefly. The correlation chart is Number 6 of a series planned and developed through efforts of the National Research Council Committee on Stratigraphy (Dunbar et al., 1942).

First Page Preview

First page PDF preview
You do not currently have access to this article.