Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/357

Rh is located immediately alongside the public road and has been very badly developed. It shows two layers of fair blue limestone; an upper, 10′ thick and lower 15′ thick, separated by 4′ of shale, the whole series being capped with impure thin-bedded limestone and shale dipping about 15° southeast. There are 3 old kilns here, but the quarry has never been extensively worked. The Lewistown limestone occupies the entire ridge here to the exclusion of higher measures, which do not occupy this ridge until the synclinal has deepened to such an extent one-half mile eastward as to hold the Oriskany sandstone and later the Marcellus slates, which make a narrow valley 1½ miles long to Cocolamus creek.

The Long, Benner and Reynolds quarry, situated on the crest of the more northern of the two Lost Creek anticlinals, and about a mile southeast of Lennart’s opening exhibits the anticlinal structure of the middle ridge. This opening is just opposite the frame schoolhouse, and shows dips of 15° and 40° north and south. There are four kilns here and a large quarry which is operated periodically for farm use, developing some excellent blue beds, in all about 25′ thick, this is the same series of rocks occupying almost a precisely similar geological position at the Landis quarry on the southern anticlinal ridge. The limestone in the middle ridge extends east for about a mile, beyond which it is enclosed in a knob of Oriskany sandstone reaching nearly to Cocolamus creek.

The Oriskany sandstone shows an outcrop in the north monoclinal ridge about a mile west of Brown’s store on Cocolamus creek dipping 40° southwards along the private lane crossing the ridge. Sink holes occur conspicuously along the north flank of this ridge and are largely the means of locating the limestone formation, here covered with chert. Between this point and Brown’s store the limestone is sparingly opened in two or three places. Where opened on the Koons and Knaus places the limestone is impure although burned for local use. The dip is about 70° southwards.

Kobel’s quarry is a large excavation on the east side of Cocolamus creek in the gap opposite Brown’s store. It was