PHYSIOGKAPHY OF SOUTH GIPPSLAND. 459 



Garnets. — Numerous in portions of the slide near and in the 

 biotites. 



Ferrite. — Patches of ferrite occur. 



Oolitic. 



The principal rocks underlying the mesozoic are Silurian, but 

 towards Cape Woolamai they have been laid down on granite, and 

 also near the contact of this granite and altered Silurian. 



The basal members of the Mesozoic as observed at the Tyers River 

 and Griffith's Point are massive coiglomerates and agglomerates. 



TYERS RIVER AXD RENTOUL's CREEK. 



If we proceed down the Tyers River from the outcrop of Silurian 

 limestone towards the Latrobe, the following sequence is observed : 

 — Massive beds of conglomerates, consisting of hard silicious rocks, 

 principally qiiartzite, indurated shale, and sandstone jjartly derived 

 from the degradation of Silurian and partly of Devonian rocks. 

 These conglomerates rest unconformably on the upraised edges of 

 the Silurian, and contain lenticular-shaped deposits of an argilla- 

 ceous shale, in which are found imprints of such characteristic 

 oolitic plants as «S'joAeHOjo/'er«s, T(cniopteris, ^lnethopleris,kc. They 

 are succeeded by thick beds of felspathic sandstone with subordinate 

 beds of shale. At lower levels, both in the Tyers River and in 

 Rentoiil's Creek to the east, outcrops of carbonaceous shale and coal 

 are seen. 



KILCUNDA AND CAPE PATERSON. 



At the south-west margin of the Mesozoic area at Griffith's 

 Point a somewhat similar sequence is observed, but the basal 

 members are made up of the detritus of granitic and metamorphic 

 rocks, and form agglomerate bands, with lenticular deposits of shale, 

 containing such vegetable imprints as TcBniopteris CcD-nithersri, 

 T. Daintreii, Alaethopteris Australia, Sphenopteris WarrayuUensis, 

 Sageni'pter'is ( 'arruihers/i, &c. 



In following the coast along the cliffs towards Kilcunda the 

 modes of occurrence and order of depositions of the beds are 

 well seen. The felspathic sandstones are very distinctly current- 

 bedded at Griffith's Point, where they begin to alternate 

 with shales, and are full of drift carbonised or silicified wood. 

 Towards •' sandy waterholes" carbonaceous shales and attenuated 

 thin seams of coal occur, which appear to merge at Kilcunda into 

 one well-defined seam of coal 3ft. in thickness, now being worked. 

 Borings carried on in the locality, and easterly towards the 

 Powlett, disclosed the seam, and another at lower levels, as in 

 No. 2 bore, which cut 2ft. 4in. at 460ft. from the surface, and 

 2ft. at 640ft. from the surface. 



An average analvsis of these coals gave: — Kilcunda - water, 

 5-91; vol. hvdro-carbon, 29-60; fix. carb., 59-12; ash, 5-36. 



