Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/148

120 F³. cut. Indeed but one tract, owned by the Beck estate, in Hartley township, above S. M. Luker’s house, had not been cut over.

Hemlock and white pine have furnished by far the largest percentage of material cut, and both varieties have existed here in great quantity and of excellent quality.

In the gap near the Half-Way House, made by the north branch of Rapid run, the Oneida sandstone shows a partial outcrop, dipping S. 10° E. 40°, showing a marked northwest cleavage which cuts its beds into large square blocks. The mountain to the east of this point forming the south. ern leg of the Buffalo mountain anticlinal, is gapped by a number of small tributaries of Rapid run, most of which take their rise in the red Medina sandstone, which makes an elevated valley between the Medina white sandstone and the outer Oneida terrace; and their effect upon the topography of the terrace ridge is so marked as to have given it the name of the Seven Notch mountain.

The Little Buffalo mountain, lying further south, is similarly notched by branches of Buffalo creek and Laurel run, the latter stream cutting so deeply in the mountain members as to afford a natural avenue for the location of the turnpike leading from Lewisburg, via Mifflinsburg and Hartleton into the Penns Valley Narrows of Centre county.

The Ore sandstone measures create through the greater part of the southern part of these two townships a distinct outlying ridge, nowhere rising to any very great height, except along the north flank of Jack’s mountain, where the steeper dip of the measures carries the Ore sandstone well up the flank, making an indistinct terrace ridge upon the side of the main mountain.

A glance at the map will show the somewhat irregular zigzag outcrop which the Ore sandstone makes through the several synclinal] and anticlinal flexures of these two townships. It shows a small triangular area in the synclinal along the north branch of Buffalo creek close to the West Buffalo line, and after reëntering the latter township, it