Abstract

Two components of magnetization were isolated in the Silurian-Devonian Andreas redbeds of the central Appalachians of Pennsylvania (lat 40.75°N, long 75.78°W): a thermally distributed, synfolding B component, and a thermally discrete, pre-Alleghenian-age folding C component. The C component mean direction and associated pole position correspond to a Silurian-Devonian paleolatitude for the Andreas location of about 35°S, which, in conjunction with Early Devonian results from Gondwana, is consistent with an Early Devonian supercontinent configuration.

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