COAL DEPOSITS. 471 
graph Hill or the South Cape, are shown in the following sketch. 
The coal beds are finely displayed in the several cliffs alluded to, and 
on this island. North of the Hunter, the shores are sandy for a long 
distance, with no exposed rocks. 
NOBBY AND TELEGRAPH HILL, NEWCASTLE. 
These cliffs contain in all five distinct seams of coal, separated by 
twenty to fifty feet of sandstone and argillaceous shale, and are shown 
as sections at the foot of the map facing the present chapter. The fol- 
lowing section was taken at the highest cliff referred to above—the 
only one which includes, above the sea level, the whole number of 
coal beds. We begin with the upper layers. 
15 feet coarse grit or puddingstone, containing quartz pebbles and hard opaque argilla- 
ceous pebbles (A). 
3 feet (I.) Coan; upper six inches clayey, the rest good coal. 
4 feet.—Dark blue clay, with thin black coaly layers (C), 
2 feet.—Argillaceous sandstone, whitish and hard (D). 
4 feet.—Clay, soft and crumbling (FE). 
1 foot.—Clayey sandstone; crumbling; easily acted upon by the weather, but a little 
harder than E (F). 
6 inches.—Similar to E. 
6 inches.—Similar to F. 
2 inches.—Same as E; uniting a few feet off with the following, 
1 foot.—Same as F. 
6 inches.—Same as E. 
2 feet.—Same as F, 
3 feet.—Same as E, 
5 feet—Same as D; fine, grayish-white; not much altered by exposure; some ferrugi- 
nous seams running southeast. 
3 feet.—Same as F, but containing thin layers of E and D. 
5 feet—Same as D, with three or four thin layers of E ; finely crumbling. 
3 feet.—Same as D for the upper foot ; below, mostly like E, with thin layers of D. 
34 feet.—Same as D, with thin layers of E; upper part schistose, lower mostly very 
crumbling ; colour light gray ; some thin ferruginous seams or layers. 
