White Deer and West Buffalo township lines. The sandstone was exposed in the gap of Spruce run; but its dip was rather obscure, and no good ore has been developed along this portion of its outcrop.
On the south side of the Buffalo valley there is another outcrop of the Ore sandstone, extending through East Buffalo and Buffalo townships on the north flank of the Shamokin mountain, nearly 7 miles long, and everywhere dipping at gentle angles of from 10°–35° to the northwest.
A considerable amount of ore has been mined in this portion of the range in former years for the Dry Valley or Union Furnace Co., whose furnace, situated at Winfield on the Susquehanna river in Snyder county, has been so long and successfully managed by Dr. Levi Rook.
The almost entire cessation of the iron business in this portion of the state during the last few years has practically led to the abandonment of work, except in one or two localities, all through the Jack’s mountain section in Union and Snyder counties. Formerly both the Danville ore beds and the Sand Vein fossil were mined in large quantities from both the north and south outcrops of this anticlinal, and a hundred different openings attest the former activity of mining operations hereabouts, as well as the general good character of the ore obtained.
Dr. Rook has already furnished a large amount of information bearing upon the old operations in this district, and all his facts have been already incorporated in Report F. His long acqnaintance with the mining and use of these ores would make it seem superfluous to add anything additional, even had it been possible to enter and examine these old openings.
The Danville ore beds have probably been more largely developed along the eastern end of Jack’s mountain anticlinal, one of the beds yielding in places from 2′ to 3′ of ore. The Ore sandstone is neither compact nor massive here, occurring in two divisions separated by slate, and from 20′-30′ thick; and the Clinton shales, immediately overlying the Ore sandstone, have been so largely eroded along the eastern end of the ridge that a very large quan-
