378 F. H. Bradley—Silurian age of the Southern Appalachians. 
such small local wrinkles as we should naturally expect along 
the somewhat irregular axis of a sharp anticlinal. Hornblendic 
layers here become rather more abundant, though there are 
still several belts of soft hydromica schists, with thin quartz 
bands, some of which are rich in gold. One of these spo 
continued westerly, passes Blairsville, Union County, 
Towns County, at Ivy Mount Mine, some of the helinblondis 
layers include copper ores, similar to those of Ducktown, 
though not yet fairly developed. Old works, followed on a 
small scale before the war, have recently been re-opened, and 
show very promising bodies of ore.* 
Passing on southward, on the Unaka Road, we find the divid- 
ing ridge, or r Blue Ridge proper, consi sting of mostly heavy- 
bedded gneisses, partly hornblendic, with some schistose por- 
tions, all dipping northwesterly in a regular monoclinal. De- 
and Walker's wtih ones in Lumpkin Conny, are the more 
prominent. These beds yield no gold; but the auriferous schists 
immediately = and show almost = aaa for at least 
sixteen miles south of Clarksville, Habersham Co. South- 
easterly dips ait from the Yonah se to about ten 
miles south of C., where the synclinal of the Chattahoochee 
Ridge gives us northwesterly ones, which continue about five 
miles, to near Hollingsworth, where we pass another anticlinal - 
and again find southeast di Besides the hydromica schists, 
with quartz veins and ten which constitute the mass of the 
strata, we find some chlorite slates, and a few beds of gneiss, 
the latter partly granitoid, pa rtly porphyritic. A few miles 
east of Clarksville, considerable —, of marble have been 
* The inclosing wallings are of very compact gneiss, partly hornblendic. lor 
ore is — and — rt ounts of arch, cwatd (sphalenite). The q 
gangue some points full of apatite, from whose alteration we have, in aces 
crevices plone the lower phe of decomposition, considerable surfaces of vivianite, 
in pale blue crystals. 
In mining reports upon this region, prepared in 1861, W. P. Blake described 
these strata as being metamorphosed Paleozoic. 
