Report on the geology of South Carolina; . laminae, varying fromone-eighth to an inch in thickness; the surface of the laminte being covered with thin plates ofmica. It passes even in the same mass into compact quartz, to be distinguished from commonquartz only by its stratified structure. The flexible portions of the rock seem to be in the incipient stages of disintegration, evidentlyproduced by the oxidation of the iron. This rock, in its compact form, is seen surmounting thelimestone at the Springs. The other locality is in Pickens District, between West Union and Oconee Mountain, on the la
Report on the geology of South Carolina; . laminae, varying fromone-eighth to an inch in thickness; the surface of the laminte being covered with thin plates ofmica. It passes even in the same mass into compact quartz, to be distinguished from commonquartz only by its stratified structure. The flexible portions of the rock seem to be in the incipient stages of disintegration, evidentlyproduced by the oxidation of the iron. This rock, in its compact form, is seen surmounting thelimestone at the Springs. The other locality is in Pickens District, between West Union and Oconee Mountain, on the landof Dr. McElroy: It is not very prominent, but may be observed crossing the road, and on a smallbranch near the house. Prof. Shepard has recently directed attention to this rock, on account of its connection with thediamond-bearing rocks of Brazil and the East. In South Carolina quartz rock is certainly associated with the most interestmg group of rocks inthe State, as will appear from the following section. OF SOUTH CAROLINA. 79 Fig. 16. 1.—Cluartz rock of Uie Kings MountQin range. 2.—Red iron ore, to some extent specular, and e,\tending; from Gel-keys Mountain to North Carolina—explored at all tho iron-works. 3.—Gold ore associated with iron —Grey or magnetic ore, in talcosc slates. 5.—Flexible quartz, Itacolumite. 6.—Lime-rock. 7.—Iron ore. On the North Carolina side a very valuable gold mine occurs very near Kings Mountain, andthe precious metal may be traced through York, as at Carrolls mine and other localities; in Spar-tanburg, at Lockharts and other mines, not far from the itacolumite locality, and thence into Union,to the Fair Forest mines. In Pickens gold is also found in the branch where this rock occurs. The resemblance between this group and the Brazilian rocks described by Humboldt, is sufH-ciently striking to invest thcni with a considerable degree of interest.* In Pickens District rutile is abundant, but as yet neither platinum nor diamon
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