dip of 15° N. W., the south leg of the anticlinal dipping 20° S. E. into the Liberty valley synclinal. Only a portion of the formation shows here aggregating possibly 60′ in the knob on the west side of the gap, but eastward the mountain rises rapidly and the dips on either side stiffen at the same time.
The Sand Vein fossil-ore bed has never been opened on either of the three outcrops exposed along the flank of Tuscarora mountain, and there is no evidence of the existence of the Danville beds at all. The south outcrop, running west towards Waterford, must show a very gentle dip, for the Ore ridge lies nearly a mile north of the base of Tuscarora mountain with a wide valley of the lower Clinton rocks between. This ridge presents a series of interrupted knobs rising to elevations of 150′ or 200′ above the valley, in every way favorable for miming operations and likely to contain a large quantity of good soft fossil.
Further west in Lack township the Sand Vein bed has been found 18″ thick and there is no good reason for doubting its presence in equally good condition through the mountain outcrop in Tuscarora township.
The Liberty valley synclinal extending west through this township is everywhere marked by a narrow band of gray lime soil, flanked on either side by wider hands of the Bloomsburg red shale. The axis passes about one-fourth of a mile south of Waterford and seems to be somewhat characterized by a number of small sink-holes, the valley itself being entirely dry during the larger part of the year.
47. Lack Township in Juniata county.
This township lies at the extreme west end of the Tuscarora valley in Juniata county, bounded on the south and west by Perry and Huntingdon counties and in shape nearly square, with a length east and west of about 7 miles and a breadth north and south averaging 8 miles. Its area therefore approximates 56 square miles. Its east and west and north and south lines are approximately parallel, but the two latter do not make right angles with the former.
