Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/393

Rh is composed of the lower Clinton shales. These latter rocks are well exposed along the road through the center of the ridge, meeting Licking creek at Hahn’s mill. They show a mass of red and brown slates and thin sandstone beds, which, in places, have been slightly cultivated and yield a fair soil.

The Ore sandstone in the north leg of the Academia anticlinal along the township road is not well exposed; but it makes a low terrace ridge just north of Woodward’s B. S. S. through which the road passes and descends the north flank into the Mifflintown synclinal limestone basin.

On the road leading south from this valley across the ridge to Academia, about one-half mile west of Johnstown, the Lewistown limestone in the basin has a slight representation flanked on either side by wider outcrops of the upper Salina lime shale.

The Ore sandstone forming the north leg of the Academia anticlinal, passes through C. Beale’s place at the forks of the road, showing a northwest dip of 60°, but not very massive. It is underlaid going south with a great mass of the brownish red and grey shales of the Clinton measures on northwest dips of 40°, declining to 20° at the crest of the axis at D. Kaufman’s.

In the south leg of the anticlinal the Ore sandstone outcrops just back or north of the Academia church, dipping southeast 40°. There is an excellent exposure of the overlying Bloomsburg red shales in Academia, making a long sloping terrace on the flank of the ore ridge, upon which the village is built.

Between Academia and Tuscarora creek the upper Salina lime shales come in upon conformable dips, slightly rolled, but averaging about 50° S. E.

Along the road east to Pomeroy’s store these Salina rocks are again seen to contain many good limestone beds, so massive indeed as to form a ridge quite as high as the main limestone ridge further south beyond Patterson’s mills. Between the store and the mill these measures show some northwest dips; but at the bridge they show a normal southeast dip of 60°, which dip continues up the creek to the dam in good massive limestone layers.