Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/389

Rh from the eastern side of the river the effect is peculiarly striking, as the variation of color in the several beds assists the eye in following the graceful and gentle curves. The locality is one of the best in the county for viewing these rocks, and it is further indicative of the force exerted upon these soft measures and the effect produced by the sudden elevation of the Ore sandstone further south on the back of the Academia anticlinal.

It may be remarked here also that the red bands in the upper Salina formation have become very intimately interbedded with the gray lime shale layers, making it somewhat difficult to distinguish the Bloomsburg red shale division here and in the territory west towards Huntingdon county. On the north side of the Mifflintown synclinal the Bloomsburg division is more readily recognizable, as it makes a distinct dark red band running east and west between the base of the South ridge and the narrow blue limestone valley, passing through Farmdale, Johnstown to Allenville.

The road west from Patterson to the Baptist cure on Licking creek is nearly always on these red shales, which, just outside the borough, show some greenish slate beds on a 35° S. E. dip, and well seen as beds of red shale in a road cut east of Cunningham’s brick house on a 30° S. E. dip. Some fair limestone beds are quarried from the middle of the basin on the Cunningham farm upon dips of about 40° S. E. The axis of the basin runs along the road between the two Birchfield farms, showing very flat dips and a rich soil.

Johnstown is situated in the center of this basin, which, along the township road between Milford and Beale, shows a rather close fold with south dips of 60° and north dips of 50°, flattening to about 10° in the center. The upper Salina lime shale belt, No. Vc′, on either side of the basin is about 200 yards wide. On this township road, north of the basin, the first red bands come in just above G. W. Snyder’s house occupying the position of the Bloomsburg division, but containing several lime bands, all dipping 45° S. E.

Between Farmdale and Port Royal, along Licking creek