Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/372

344 F³. The Ore sandstone and the lower Clinton measures, forming a terrace and a single outcrop on the north flank of the mountain, are likewise largely concealed west of the railroad. On both sides of the river, however, the flattening dip of the measures has thrown the Ore sandstone outcrop nearly one-half mile north of the mountain, where it makes a distinct ridge of its own, rising to elevations of 150′ above the river on the east side, dipping 25° N. W.

The old Juniata furnace, now dismantled, was situated south of this ridge and a little further down the river, and was built upon outcrops of reddish-brown (iron) sandstone and brown shales underlying the Ore sandstone measures, dipping N. 20°.

Passing northwards through the gap in the ridge the Ore sandstone again shows at the first creek crossing, succeeded northwards-by a band of the Bloomsburg red shales on a dip of N. 10° W. 40°. The upper Salina lime shales overlie these to the main valley road outcropping with increased dips of 50°. All the valley between this main road and the river is occupied by these upper Salina marls and lime shales, which, as usual, make it extremely fertile and attractive farming soil.

Another belt of these rocks, about three-fourths of a mile wide, is brought up upon the crest of the Academia anticlinal entering from Walker township near the center of Delaware. As this broad axis enters this township to finally die away altogether its crest is indented by a narrow synclinal along Delaware run which holds the Lewistown and Oriskany formations.

Mr. Samuel Evans has opened a very good limestone quarry in the Lewistown formation about one-fourth of a mile west of Delaware run and just east of the road crossing over the ridge. The quarry has not been very economically opened and is situated in the south leg of the south axis exposing 25′ or 30′ of very dark blue limestone on a 50° S. E. dip.

D. B. Dimm has opened another quarry immediately op-