Report on the geology of South Carolina; . Limestone Springs, the gangue is coarse common quartz,very irregular in thickness, and cutting the mica slates a little to the East of the strike. Thisvein, judging from the surface rocks, bids fair to be productive, but hitherto it has not proved so inthe extraction of the gold from the gangue. Nuckols and Norriss mine, a few miles above Grindal Shoals presents one of the very best oppor-tunities of examining the gold-bearing quartz veins, in their relation to the rocks which they inter-sect. This mine occupies the top and side of a hill, and is ther
Report on the geology of South Carolina; . Limestone Springs, the gangue is coarse common quartz,very irregular in thickness, and cutting the mica slates a little to the East of the strike. Thisvein, judging from the surface rocks, bids fair to be productive, but hitherto it has not proved so inthe extraction of the gold from the gangue. Nuckols and Norriss mine, a few miles above Grindal Shoals presents one of the very best oppor-tunities of examining the gold-bearing quartz veins, in their relation to the rocks which they inter-sect. This mine occupies the top and side of a hill, and is therefore exceedingly favorable as amining ground. A thin stratum of mica slate, in which the veins were first detected, caps thehill and rests upon granite, much disintegrated and decomposed. On the hill side, in this softgranite, an adit level has been driven a distance of eighty feet, which intersects at least some ofthe veins which are exposed on the surface, showing that they extended from the granite upwards,through the slates. Fig. A horizontal plan of this mine is presented (Fig. 18) which shows the relative position of thelodes cut by the level. They are represented by the dark lines crossing the level. They vary in OF SOUTH CAROLINA. 89 thickness from one to six feet. As this level was driven with a view especially to exploration, thelodes liave not been followed, to any extent, beyond what was merely necessary to prove them. Fig. 19.
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