Geochemistry of Graywackes and Shales

See allHide authors and affiliations

Science  04 Mar 1960:
Vol. 131, Issue 3401, pp. 664-665
DOI: 10.1126/science.131.3401.664


Sixty-nine graywackes and 33 shales were analyzed spectrographically for 14 minor elements to illustrate the variation of composition within a graywacke bed, between beds in one section, between sections, and between formations. Analyses of several fractions of a graywacke indicate what each contributes chemically to the rock.