80 
Geology and Physical Geography : 
areas. At Griffith’s Point there are layers of coarse and fine con- 
glomerate composed of granite detritus, pebbles of quartz, 
quartzite, &c., and soft earthy breccia-conglomerates made up of 
water- worn and angular fragments of somewhat hard greenish 
mudstone. Some of the sandstones between Griffith’s Point and 
Fig. 28 . — Sketch op Section at Townsend Bluff. 
Kilcunda afford durable building stones, but, as a rule, the rocks 
are of a soft felspathic character, much jointed and faulted, 
the faults being frequently accompanied by basalt dykes, nut 
observed in the Cape Otway country. (Fig. 28.) False bedding 
and frequent variations of dip and “ rolls” in the strata are also 
noticeable. 
North of the La Trobe valley, along the Tyers River, and in 
Rintoufs Creek, fine sections occur, showing the contact of the 
Mesozoic with the Silurian rocks. The lowest beds of the former 
are coarse thickly-bedded ferruginous and siliceous conglomerates 
of quartz, quartzite, hard sandstone pebbles or boulders, and sand, 
derived from the denudation of the Silurian rocks, and, in some 
places, 100 feet in thickness. These conglomerates become finer in 
character towards the south, and are overlaid by thick-bedded sand** 
stones, followed by alternating sandstones and shales, which, in 
dilferent varieties of colour, texture, and hardness, constitute the 
prevailing rock3 of the series, as developed north of the La Trobe 
and in the South Gippsland Ranges, to the south of that river. The 
bedding in these tracts is more regular than in the Cape Patterson 
