the Oriskany sandstone of the north lip of the synclinal and for an equal distance west on the supporting Lewistown limestone.
The Oriskany sandstone makes a broad flat double-crested hill for about 2 miles west of the eastern township line, but beyond that point the synclinal rises rapidly and the Lewistown limestone forms the hill to the exclusion of the sandstone for the next 1½ miles. Beyond that, 1 mile to the river, the limestone has been eroded and the synclinal hill gently sinks, holding only the upper Salina lime-shales.
Lewistown limestone quarries.
The Banks quarry is the first opening in this township, located about one-fourth mile west of the Fayette line. This opening is about 100′ long and though not active when seen in June, 1888 it had been worked during March of that year and some 3000 bushels of lime burned. The dip is not over 35° S. E. and the quarry affords about 30′ of good blue limestone in rather thin beds and showing nests of calcite.
D. Beshour’s quarry is the next opening about three-eighths of a mile west. It is a smaller quarry but capable of furnishing much good stone. The dip is 40° S. E. here and the limestone somewhat lighter in color.
Two fields west from here there is a small nameless quarry about 100′ south of the road opened in the same strata, and west of the road crossing the Flintstone ridge a small thickness of the good beds of No. VI have been sparingly opened at Gingerich’s quarry just beyond the point of the Oriskany ridge.
Still further west the north flank of the ridge shows some few exposures dipping 70° to the southeast as the basin shallows, but no quarries have been opened here and the stone has become very hard and cherty. Along the road leading into Mifflintown there is a sharp anticlinal ridge extending for about 2 miles east of the river with dips of 40° N. W. and 70° S. E. in the upper Salina shales, which accounts for the presence of the narrow limestone synclinal extending for about an equal distance east of the river along the north side of Happy Hollow run.
