| Carbonate of lime, | 47.018 |
| Carbonate of magnesia, | 2.240 |
| Insoluble residue, | 9.610 |
At the same place the Sand Vein was once opened by the Messrs. Mann, 18″ thick, the underlying sand rock being 3′ thick. An old opening on this bed, by a gangway 140 yards long, showing 12″ of good rich ore in the 16″ or 18″, with the following analysis:
| Iron, | 46.950 | per cent. |
| Sulphur, | .005 | |
| Phosphorus, | .310 | |
| Insoluble residue, | 22.880 |
At the Lucy Furnace, at Mt. Union, the Ore sandstone 30′ (?) thick dips 25° S, and the Sand Vein about 16″ thick; and over it here are several beds, 2″ to 6″ thick of fossiliferous limestone.
The Danville beds also show here, the two upper beds being separated by 6′ of rock. The upper bed is said to be 18″ to 24″ thick, and the two others 10″ to 12″. They could not be well seen or measured, and have never been mined to any extent.
No. V. in Ferguson valley.
Ferguson Valley is a name given to all that belt of country occupied by the Clinton and Salina rocks, lying between Jack’s mountain and the Lewistown ridge, and between Kishacoquillas creek and north of Meveytown.
It is an anticlinal valley, the crest of whose arch is indented with a synclinal roll, so that the map shows four outcrops of the Ore sandstone and accompanping fossil-ore beds about 8 miles long. This has been the scene of many individual ore operations, although during the season of inspection (1888) but one mine, the Phillip’s bank, was actually worked.
The Ore sandstone is first brought up in this anticlinal about 2 miles west of Kishacoquillas, and for 2½ miles the ridge shows only a double outcrop of this rock, about ¼ of a mile apart, with opposing dips and including between them a portion of the lower Clinton rocks. The arch here
