 Plunketts Creek is in the southern edge of the dissected Allegheny Plateau , near the Allegheny Front . The underlying bedrock is sandstone and shale , mostly from the <unk> sub @-@ period , with rock from the Devonian period in the north of the watershed . The northern edge of the Plunketts Creek drainage basin is formed by <unk> Ridge and <unk> Ridge . Plunketts Creek flows along the north side of Camp Mountain and , on turning south at Proctor , forms a water gap between it and Cove Mountain ( to the west ) . 
