Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/151

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8, 9.Lewis and Hartley in Union.

F³. 123

that axis and Jack’s mountain and then returns on a north dip along the flank of the latter for 10 miles to the Penns creek crossing on the Limestone township line.


The Bloomsburg red shale in a measure follows this outcrop from Hartleton to within 3 miles of the Mifflin county line; but when its outcrop returns on the south side of the Buffalo valley synclinal, the local Laurelton anticlinal axis extends its double outcrop for almost 2 miles east of Laurelton without apparently effecting the Ore sandstone outcrop in the least. Indeed this Laurelton axis seems to be a local roll entirely, extending for about 2 miles east of Laurelton and 4 miles west, everywhere crowned with the upper Clinton lime shales just under the lower Salina or Bloomsburg division.

North from Hartleton about half a mile this red shale belt crosses the road near Hower’s on a 50° S. E. dip, and again upon the Centre county turnpike about a mile west of Hartleton and near the blacksmith-shop, where it shows a dip of 15° S. 30° E. and carries some brownish-gray sandstone. The road turning south to Laurelton soon passes into a synclinal of upper Salina gray calcareous shale; but at Laurelton the red beds come in again on a 30° N. W. dip on the south side of the basin, behind which on the Laurelton axis, the Clinton shales have been considerably dug in a clayey condition for brickmaking, and from it some excellent bricks have been made and considerably used in that village.

North of the Smith shop along the pike and up Laurel run Paddy’s mountain anticlinal is present in fissile yellow shales close to the forks of the road west of the Evangelical church, with dips of 20° S. E. and 10° N. W.

Further west at Kieckler’s the same rocks dip 20° to the northwest and outcrop for some distance along the pike, decomposing readily to a reddish-brown soil. The Clinton measures extend well up the valley of Laurel run, though nowhere well exposed beyond the toll house, where the dip is 45° S. E.