THE COAST OF NOETKUMBEULAND. S55 
limestone about three feet thick (in which is the same gra- 
dation to a crystalline appearance, as mentioned above)^ 
rests on the trap (here containing many minute particles 
of iron-pyrites) ; on the limestone is a shale, about eighteen 
inches thick, containing vegetable remains ; and on it an- 
other trap, approaching to columnar in its structure, about 
eight feet high : a -vein of the same substance connects the 
upper and lower beds of that rock, passing through the 
shale and limestone. 
Beyond this, we meet with a small imbedded mass of 
coarse grit (25), a portion of a thin bed of limestone lying 
on, and a mass of the same substance imbedded in the trap : 
together with portions of trap, with much imbedded quartz, 
of impure compact felspar, and of felspar inclining to 
jasper. 
At 35, 36, are a bed of fine sandstone and of limestone, 
under the trap. 
At 37, is a clay slightly inclining to wacke, below the 
trap, and which appears to be part of the same bed as oc- 
curs again at 46 and 58. 39 is a bed of trap, with com- 
pact felspar, on which rests a columnar trap; and under it 
is a shalei and a limestone about eighteen inches thick, be- 
low which the trap occurs resting on 37. 
The section C D shews one of the most curious appear- 
ances in this tract ; the columnar trap, from seven to twelve 
feet high, rests in part on a shale (42) about two feet thick, 
below which is a bed of trap (43) about one inch thick. 
From this the columnar rock descends to a limestone 
about four feet in thickness, and from thence to 46, a bed 
resembling 37, mentioned above. In one part, a vein of 
trap, connected with the upper columnar rock, passes 
through these three beds, which, near it, appear much al- 
tered. 
Leaving this spot, we pass over a thick bed of sandstoney 
s 2 
