224 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
topographic features in the area. Careful study of a large number 
of representative specimens shows the occurrence of certain variations 
in texture and composition, but the typical examples contain little 
else than grains of quartz cemented into a firm, resistant, bluish- 
gray quartzite. Occasional grains of pyrite, muscovite, biotite, and 
feldspar occur. Crushing and shearing may be observed in some of 
the specimens, while in others the rock seems to have suffered but 
little from those forces which produced strong foliation in neighbor¬ 
ing beds. 
With increase of mica the quartzite grades into the mica schists, 
giving all stages between the two types of rocks. With increase of 
feldspar and more marked effects of shearing, transition to the gneisses 
takes place. It should be noted, however, that these changes involve 
changes in original composition and texture, and are not due to weath¬ 
ering. 
The distribution of the quartzite is of peculiar interest. It forms 
occasional thin beds in the mica-schist series, but has its typical and 
extensive development in the vicinity of the Tallulah Falls and Gorge. 
Examples of its occurrence as thin beds are found in the gorge of 
Panther Creek below the juncture of the north and south forks, and 
on the north fork below the railroad. Falls occur at both places. 
The quartzite beds conform to the general northeast-southwest 
strike and southeast dip of enclosing gneisses and schists. 
Pegmatite veins .—• The mica-schist series is cut by a number of 
pegmatite veins which may run parallel with or cut across the foli¬ 
ation. These veins are generally badly decomposed wherever ex¬ 
posed, consisting mainly of quartz in profoundly kaolinized feldspar. 
Limestone .—- At several localities in the gorge of Little Panther 
Creek are found exposures of a compact, fine-grained, bluish-gray 
limestone. This rock has been quarried on a/ small scale for the 
production of lime. From the distribution of the limited exposures 
it appears that the limestone belt strikes northeast-southwest, parallel 
with the general trend of the foliation in the gneisses and schists. 
Slate .— In the gorge of Little Panther Creek near its junction 
with the main Panther Creek, and near the junction of the latter 
with the Tugaloo River, are exposures of an impure carbonaceous 
slate which weathers to a black soil. What appears to be a more 
micaceous variety of this same rock is found farther southwest on 
Little Panther Creek. These three exposures are in a northeast- 
