124 J. L. Campbell— Geology of Virginia. 
of four or five miles from the turnpike, in a northeasterly diree- 
tion, some interesting developments of 7 and 8 are found along 
the foot of what is here called Furnace (or Knob) Mountain, 
through a gorge of which the Big Calf-pasture, the chief fork 
of North River, comes down from the Great Goshen valley on 
the west. In this gap tolerably well-defined arches of 5 a, are 
displayed on the right as we pass up the river, while on the left 
(Bratton’s Mountain) the same rocks are overlaid by a bed oi 
eé arch on the right hand is the one represented on the 
section. 
quarried from 7, and also at points nearer to Goshen. Just 
west of Panther Gap in Mill Mountain (through which both 
ters to have undergone some modifications. Beds vary- 
ing from siliceous slates to argillaceous sandstones are found 
cropeaa out, especially in 6, as may be seen both on the railroad 
and the turnpike. Large quantities of these rocks have been 
brought from the tunnel near Millboro depot. Calecareous con- 
cretions of a disc-like form, full of veins of infiltrated carbonate 
‘4 
