Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/408

380 F³. posed at the first road near J. Kirk’s house. Two high parallel ridges, very narrow and with steep flanks, succeed going south without good exposure, but evidently composed of the Hamilton sandstone. The second one is higher thethe higher [sic] and broader of the two, and shows some thin bedded gray sandstone and shale between Andrews’ mill and the creek crossing on a dip of 20° S. E.

Repeated exposures occur going down Willow run, at first sandy and gradually becoming more and more slaty.

Taking the right hand road over the hill to Waterford a splendid exposure of gray and black Genessee slates and thin sandstone shows in the stream at the forks of the road near Milliken’s, 25′ thick and dipping S. 35° E. 15° to 20°. Gray shales follow on top of these going np the ridge, showing very little sandstone.

This ridge probably contains some Chemung rocks in the synclinal, and from its summit both the bounding Oriskany hills on either side of hethe [sic] Tuscarora valley can be readily overlooked. Descending its south flank the gray slates again appear on a 10° N. W. dip, on the south side of the synclinal, and in the ravine still further south some shales and sandstone outcrop on a 25° N. W. dip. A belt of hard angular gray sandstone, smooth-grained and very tough, show near the red frame school house dipping 45° N. W., probably associated with the Hamilton measures,

In the gap north of Waterford, the Marcellus slates outcrop on a 40° N. W. dip, succeeded south by the Oriskany sandstone, which has here become a mere mass of shale and shaly sandstone 40′ thick creating a very low ridge. The Lewistown limestone underlies these rocks upon a dip of N. 85° W. 35°, and makes a supporting flank of the ridge, well exposed also in the creek at the north end of the bridge. It is about 60′ thick and exhibits some good limestone beds.

A little over a mile northeast from Waterford the Tuscarora creek cuts through the limestone and sandstone ridge at Smelker’s house, beyond which the limestone ridge becomes doubled, by reason of the synclinal and anticlinal north of Bealetown. The North ridge ends on Tuscarora