Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/349

Rh ain to Mahantango creek, adds four miles to its north and east boundry, the true eastern line running off from this three miles in length to the little summit between Bird’s run and the branch of Cocolamus creek. The south line passes from here across Cocolamus creek to the Flintstone ridge, holding that ridge for a distance of about four miles which is about one-half the length of its southern border line. The Fermanagh line bears nearly at right angles to this, crossing the ends of Lost Creek ridge and over the Slenderdale ridge a little over five miles to the Shade mountain crest. The township is roughly eight miles long by five miles wide; but by the loss of the triangular area in its northeast corner it will not contain over thirty-six square miles.

Lost creek is the most important stream in the township. Rising high up in Shade mountain in the Spiegelmeyer slate valley between the two opposing crests of the anticlinal, it descends with great force and a considerable volume of water in a southwest direction through the township, gapping both ridges along the south flank of Shade mountain; cutting down the Ore sandstone terrace ridge in like manner, and then cuts completely through the Slenderdale ridge, where if exhibits excellent exposures of the Ore sandstone and the underlying lower Clinton rocks. Southwest of this ridge it passes through a fertile valley of the Salina rocks to Oakland mills, where, receiving a number of small tributaries, it acquires strength enough to cut backward through the double-crested Lost creek ridge in Fermanagh township, passing thence westward along its north flank to the Juniata.

A small portion of the eastern end of this township is drained southward through Cocolamus creek which takes its rise in many small springs in this township between Flintstone ridge and the base of Shade mountain.

McAllisterville is the only village of any importance in this township, with a population of several hundred people largely engaged in agricultural pursuits. About a mile east of this village is the summit of the divide between the waters of Lost creek and Cocolamus creek, the valley sloping