E. F. PITTMAN AND T. W. E. DAVID. CV. 
granitic rocks throughout its entire length, with the excep- 
tion of the central portion, where the deep Permo-Car- 
boniferous, basin overlaid by Triassic rocks crosses it 
obliquely, in a general N.N.W. direction; the portion lying 
to the north of this basin is known as the New England 
Tableland, while that to the south comprises the mountain- 
ous country extending from Gulgong to the Bathurst Plains, 
the Monaro Tableland, and Australian Alps. In the last 
mentioned, the Main Dividing Range attains its greatest 
elevation, about 7,328 feet at Mount Kosciusko. Its alti- 
tude elsewhere varies from about 2,000 feet up to about 
4,000 feet. It has the character of a wide and deeply 
denuded fold range. In the southern massif the cores of 
the oldest axes are chiefly granites, intruding in succession 
Lower Silurian, Upper Silurian, Devonian and Carboniferous 
rocks, while the northern massif, (the New England Table- 
land) is formed of Carboniferous and Devonian rocks intruded 
by granites, porphyries, and serpentines. 
The enormous amount of denudation to which this Divid- 
ing Range has been subjected may be inferred from the 
fact that if the great anticlines of Silurian and Devonian 
rock were restored over some of the granite areas like 
those of Bathurst, they would constitute an immense range 
of alpine proportions. The material removed by this pro- 
longed erosion has partly been carried eastwards to form 
the Post-Carboniferous strata of the coastal area, and the | 
Triassic, Cretaceous, and Cainozoic deposits of the Western 
Plains. The diversity of rock material which has thus been 
furnished, has resulted in the formation of soils eminently 
suitable for agricultural purposes, provided a sufficiency of 
water were available. The rainfall of the Main Dividing 
Range varies from 23 inches at Olinda, to 83°8 at Condong 
as is shown by Mr. H.C. Russell. The rocks composing 
this range are impervious. 
