limestone, in which the good beds are interleaved with inferior ones as follows:
| Gray blue stone, weathering rough, | 8′ |
| Siliceous white stone; cavernous, | 4′ |
| Good blue beds, smooth grained, | 8′ |
| Thin bedded blue stone, weathering rough but pure, | 12′ |
| Hard blue limestone bed; good quality, | 6′ |
| Thin blue beds, hard and siliceous, | 6′ |
| Massive blue bed, sparingly opened, | 12′ |
| Bluish-gray bed, not well exposed, | 4′ |
The Lutheran church quarry on the west side of the ravine shows the same beds, but not so largely developed. Both furnish good lime for country use and both carry a considerable thickness of sandy lime shales on top, quarried slightly for road purposes, and showing lime shales and thin limestone beds, from 50′-60′ thick. There is an interval between these lime shales and the quarries with a vertical thickness of about 100′ which may contain good limestone beds, Just before entering Beaver township the ridge shows a long sloping terrace to the south of a back bone of No. VII chert, exposing an outcrop of shaly limestone from 60′-80′ thick on a 25° north dip. This gentle dip of course spreads the outcrop; but the No. VI formation does not seem to be very massive here.
Smith’s quarry is located within the borough limits of Middleburg on the west side of the Centerville road. The rock exposure consists of the upper 30′ of No. VI dipping N. 10° W. 40°–50°. The “soapstone” band is visible here; but the good beds beneath it are largely covered up with débris and have not been actively worked. The quarry is about 60′ long; but when seen in August, 1888, was in a frightful condition, the stone having been quarried here and there, without rhyme or reason, and producing a very rough and unattractive appearance in the exposed faces.
East from Middleburg along the road, the limestone out- crops frequently on a 40° north dip, the road gradually ascending the bill and passing over higher limestone beds.
J. Walter has opened a small quarry ⅓ a mile from the county seat and close to the north side of the public road, and exposing about 30′ of the upper rough beds of the massive portion of the Lower Helderberg formation.
