Abstract
The stratigraphic succession of part of the Archean volcanic and sedimentary assemblage in the Birch-Slate Lakes district does not conform to the simple Keewatin-Timiskaming concept of an earlier dominant volcanic period followed by a period of sedimentation. Sedimentary formations of the Slate Lake series, formerly considered of Timiskaming age, occur with structural unconformity stratigraphically beneath the so-called Keewatin volcanics which are, in turn, overlain by younger infolded sediments. A knowledge of the stratigraphic succession of the rock units in this district permits correlations of the different series with those in adjoining areas.
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