repeatedly folded in the center of the valley, but finally rise upon each side of it on the flanks of Jack’s and Shade mountains.
The Clinton rocks proper occur only along the flanks of these two mountains, none of the subordinate axes having been strong enough to lift the Ore sandstone member of this group to daylight between the two main opposing outcrops which create terrace ridges on the inside flanks of the mountains.
Mann’s Factory Mine. The Ore Sandstone is about 20′ thick in front of Logan’s gap, and 25 years ago the Messrs. Mann opened the Sand Vein ore bed on the bank of Kishacoquillas creek, where it is reported to be about 18″ thick, but mostly hard ore. The Danville beds (lying beneath or further north than the Ore Sandstone) were also found at this point, three in number and spread through about 15’ of rock. The largest was from 12″-15″ thick, and an analysis of the ore that came from them is given as follows in Report F, p. 17:
| Iron, | 26.100 | per cent. |
| Sulphur, | .051 | |
| Phosphorus, | .544 | |
| Carbonate of lime, | 47.018 | |
| Carbonate of magnesia, | 2.240 | |
| Insoluble residue, | 9.610 |
An old abandoned drift is still partially accessible at about 40′ above water level on the east side of the stream. At this point a gangway was driven some distance into the hill and is said to have developed soft ore entirely. The bed dips 56°, south, and was from 16″–18″ thick, about 12″ of which was good rich ore. Above this bed and separated by a thin stratum of sand-rock, another bed of fossil ore was found. None of these points could be verified, as the drift cannot now be entered. A specimen of the ore was taken from the opening whilst it was actively worked, and yielded as follows:
| Iron, | 46.900 | per cent. |
| Sulphur, | .005 | |
| Phosphorus, | .310 | |
| Insoluble residue, | 22.880 |
