Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/213

Rh the vein about 22″ thick on a 35° north dip. This opening yielded ore analyzing 48 per cent. of metallic iron, .326 per cent. of phosphorus and 15 per cent. of insoluble residue. The Danville beds were also opened here, but found very thin.

The Reuben Dreese property was opened about the same time and mined by the same parties by a tunnel a short distance further west and about a mile southwest of Adamsburg, close to the point where the tramway branches to enter the ore synclinal to the south. The Ore sandstone is well seen here 22′ thick, and the Sand Vein averaged about 20″ in thickness on a 30° north dip, yielding breasts about 15 yards in height. It will be seen that the ore bed is gradually becoming thinner going westward on this range; but at the same time it contains a less amount of Jack, here largely an argillaceous ore, which was formerly mined and accepted by the iron masters, but which would be generally rejected at the present time, and therefore has lead to the abandonment of most of these operations.

The Romig & Brackbill properties were formerly opened in the gap of the ore ridge through which the tramway extends to the ore basin farther south, and near them the old Shaumbach tunnel was located in 1875. All these openings are likewise closed and are said to have developed the Sand Vein with about the same characteristics of thickness and quality as found upon the last described property. The ore mined was largely soft fossil.

West from this point in this and West Beaver townships the Sand Vein ore bed has never been found to exist with good quality and mining thickness, and although the Danville ore beds furnish good surface indications as far west as the Mifflin county line they have never been mined and cannot be relied upon to furnish as handsome an ore as found in the ore basin south of Adamsburg.

The Lower Helderberg limestone makes but a single outcrop in the southern portion of Spring township extending east and west as a high ridge north of the railroad and Beaver creek and most largely developed in the vicinity of Adamsburg. The corresponding outcrop on the north