114 GEOLOGICAL SURVEY 
horse and buffalo tracks pointed out to visitors of Table-rock. These impressions are altogether due 
to the unequal disintegration and decomposition of the rock: every shower of rain dissolves or 
washes away the portions that have crumbled down, leaving these fancied tracks on the surface. 
Granite is also found on the surface on Rocky River, and farther south, on Little River; around, 
and in the vicinity of the village, and again between the latter river and the North Fork of Cal- 
houn’s Creek. There are but few localities, however, where the granite appears at all conspicuous ; 
and it is so associated with gneiss, (both much decomposed,) that it is difficult, if not impossible, to 
separate them. 
The trap of Abbeville is well developed in the centre of the western side of the District, between 
Little River and the Savannah. No locality in the State offers so good an opportunity for observing 
all the characteristic features of this rock, as is presented at Calhoun’s Mills, on Little River. A 
few hundred yards above the mill a space of some extent is laid bare by the overflowings of the 
river; and here a series of rocks composed of trap, porphyry, sienite, and eurite, all finely exposed, 
may be seen. 
A remarkable structure is presented by the trap at this place: the rock is divided by concentric 
joints, which are crossed by others, that are nearly, but not quite coincident with the radii of the 
curved surface. The cut, Fig. 24, represents a horizontal section of this rock. 
At other places the trap appears in its more common form of globular masses, coated with a 
rusty loking shell. The texture of these rocks varies between that of fine, compact basalt and 
coarse greenstone. 
The tract so generally known as the “ Flat-woods” of Abbeville, and to which this locality belongs, 
differs principally from the trap lands of Chester, in being more broken and undulating, and hence 
better drained. Indeed the term “ Flat-woods” is descriptive of but a small portion of this region. 
It is drained by Little River and its branches. The water, like that of the springs and wells of 
Chester, is charged with lime and iron; and on Mr. Norwood’s plantation there is a spring contain- 
ing lime, magnesia, iron and sulphur, which, in a more favorable position, would, no doubt be a 
place of resort. Chalybeate springs are not uncommon, 
The outline of this remarkable region is very irregular; and even in its very midst other rocks 
are found associated with the trap; the whole tract will, however, be included by a line drawn 
from Russell’s Creek to Little River, at the mouth of Anderson’s Creek; crossing, towards the West, 
Calhoun’s Creek and its tributaries; re-crossing Little River, at Davis’s bridge, and thence to the 
