138 
GEOLOGY OF NORTH CAROLINA. 
sive to more or less schistose in structure. Tremolite 'is of frequent 
occurrence in the limestones, which, as already intimated, are dolomytes 
at least in part, as shown by the following analyses of Dr. Genth : 
I 
II 
III 
Quartz and Silicates, 
0.44 
2.5G 
0.32 
Carbonate of Lime, 
97.86 
94.51 
54.10 
Carbonate of Magnesia, 
1.29 
2.12 
44.44 
Carbonate of Manganese, 
0.18 
0.21 
0.52 
Carbonate of Iron, 
0.23 
0.60 
0.G2 
I and III are white and fine grained, from Yalley River, the former 
near Taylors ; II is the red or pink marble from Elowing Cave, on USTan- 
tehaleh river. 
The section on French Broad begins at the State line near Faint Rock 
in Madison county. The vertical cliffs along the river gorge at this point 
are gray and light colored quartzose sandstones and quartzytes with oc- 
casional thin beds of dark gray clay slate. Passing up the river, we find 
these quartzytes interbedded with and finally replaced by shales, and then 
by thick bedded grits and conglomerates, or breccias. These are suc- 
ceeded by heavy beds of argillaceous slates and shales, brown and gray, and 
at "Warm Springs, about 6 miles, by compact blue and gray limestones 
and a calcareous gray sandstone, and half a mile above, by vertical cliffs 
of much jointed quartzytes, which continue for nearly two miles with lit- 
tle interruption, and give place, just below the mouth of Laurel river, to 
blue and gray clay slates and coarse conglomerates, which outcrop again 
5 or 6 miles southwest on Shut-In- Creek. Above Laurel river come in 
heavy beds of greenish and reddish felspathic quartzytes and gneissoid 
rocks for more than a mile, and then gray, dark blue, and spotted argil- 
laceous slates, after which the gneisses and hornblende slates and crystal- 
line limestones of the Laurentian succeed. This cross section would make 
nearly ten miles in a direct line. The disturbance, the folding and crush- 
ing of these strata has left them in such disorder that it is difficult to make 
out their position with any satisfaction, but after leaving the almost 
horizontal strata of the cliffs at Faint Rock, the dip, which is generally 
between 40° and 70°, is predominantly easterly, but with many excep- 
tions, until the Warm Springs belt is passed, after which the dip is re- 
versed, for the most part, through a section of several miles about Laurel 
River. The limestones of the Warm Springs section pass westward into 
Tennessee, and northeastward up the valley of Laurel River and through 
