Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/175

Rh About 1½ miles west of the village the ore measures outcrop through lower ground away from the mountain, owing to the dip decreasing to about 40°, and they continue to form distinct low terraces westward into Adams township. Nowhere in this part of the outcrop have the ore-beds been developed whatever, and there is no evidence at hand to show that they are any larger or more desirable than they have been found to be east of Centreville.

The lower Salina or Bloomsburg red shale creates a parallel band of red soil running east and west through the township and best seen in the village of Centreville.

The upper Salina No. Vc, overlying these red rocks, make a somewhat wider belt to the south of them and contain several thin but rather impure beds of limestone; but their high dip makes the belt of valley land occupied by them quite narrow and thereby reduces the width of farming land.

The Lower Helderburg limestones No. VI make no well defined ridge until about 1 mile east of Centerville in Union county and crossing into Centre township, a short distance west of Kerr’s saw mill, there are two small qnarries or side cuts on Mr. Kerr’s land which have been sparingly worked for local supply of lime. The dip here is about S. 15° E, 35°–40° and about 20′ of the upper part of the formation has been exposed. The quarries were in bad shape and the lime burned seemed rather dull and gray. West of the kiln some good stone had been developed along the creek; but the better beds cannot be properly quarried here by reason of the danger of undermining the public road which runs along their outcrop. The limestone measures create a low but rising hill westward, generally south or along the public road leading to Troxelville; but as there are no ravines cutting the ridge until within a short distance of the Adams township line there are but few natural advantages for quarrying in this part of the field, and the beds consequently are nowhere well exposed.

There is a small quarry just south of the small stream at Centerville on the east side of the road leading to