Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/140

112 F³. first seen on the western side of the township just where Penns creek crosses the line; and along the public road, a short distance further east, it outcrops on a northwest dip of 10°, near J. Miller’s, the ridge rising and becoming more prominent as it extends eastward.

North from the bridge over Penns creek at Centerville, still farther east, the Medina white sandstone of Jack’s mountain has sunk beneath a plain of the lower Clinton shales, the latter rocks dipping about 25° N. W. before reaching the school house, where this dip has increased to about 30° in the upper Clinton brown shales underlying the Ore sandstone. The latter rock is not well exposed at this point, although the ridge that it creates is quite persistent and prominent by reason of the prevailing low dips, which throw it nearly three-quarters of a mile north of the base of the mountain.

North of Battletown, along Sweitzer run, the Ore sandstone shows on a 35° N. W. dip, shaly and without ore, and soon succeeded northward by a wide band of the Bloomsburg or lower Salina red shale on an 80° dip, which outcrops all through this township in a belt generally parallel to the trend of the mountain, from White Springs on the west to West Buffalo township line.

Neither the Sand Vein or the Danville fossil ore beds ever seem to have been worked along this northern outcrop of the Ore sandstone, west of Sweitzer run, although if either bed was found its low dip would insure a large quantity of soft fossil ore.

East of this creek, the Ore sandstone is not well exposed; but an ore bed, 15″ thick, yielding both soft and hard fossil, was reported open on the Kunkle farm, which has developed the same ore formerly worked by Mr. Rohbach and Dr. Rook, between the New Berlin-Mifflinburg road and the Buffalo township line.

Dr. Rook’s mine is a slope, about 100 yards on the vein, and driven east from the foot about 50 yards, probably in the Danville beds, where as much as 3′ of ore has been found for short distances, although the bed will not average more than half that throughout any length of its outcrop.