Abstract

Gravity surveys in central Pennsylvania were made in an attempt to obtain information which could be related to subsurface structures near the Allegheny Front. Results show no distinct relationship between gravity anomalies and major structural folding; however, they do indicate an intrusion or upthrust of the basement east of the Allegheny Front. It is believed that this basement feature was responsible for the forces causing the northwestward structural salient in the Appalachian Mountain of central Pennsylvania.

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