142 Dr. Fitton on the Geology of Australia. 



sand-stone ; from a stratum which dips to the south-east, at an 

 angle of about ten or fifteen degrees. Micaceous and argil- 

 laceous fissile sand-stone, of purplish and greenish hues, in 

 patches, or occasionally intermixed ; — precisely resembling the 

 rock of Brecon, in South Wales, and, generally, the " old red 

 sand-stone" of the vicinity of Bristol and the confines of Eng- 

 land and Wales. Fine-grained thin-slaty sand-stone, resembling 

 certain beds of the coal formation, or of the millstone grit, is 

 found in large masses, under an " argillaceous cliff," on the 

 north side of Lacrosse Island. 



The specimens from the interior of Cambridge Gulf are from 

 Adolphus Island, and consist of reddish and gray sand-stone, 

 more or less decomposed. 



Vansittart Bay, about one hundred and forty miles north- 

 west of Cambridge Gulf. — Reddish quartzose sand-stone, or 

 quartz-rock. Indistinct specimens of green-stone, with adhe- 

 ring quartz ; apparently a primitive rock. 



Port Warrender, at the bottom of Admiralty Gulf, about 

 forty miles south-west of Vansittart Bay, (Narrative, vol. i. 

 p. 322, 323.) — Epidote and quartz, in small crystals confusedly 

 interlaced ; apparently from veins, or nests, but unaccompanied 

 by any portion of the adjacent rock. — The structure in one of 

 these specimens approaches to the amygdaloidal. A compact 

 greenish stone, with disseminated crystalline spots of epidote, 

 and of quartz, and apparently consisting of an intimate mixture 

 of those minerals, is also among the specimens from PortWar- 

 render. 



All these specimens are from detached water-worn masses 

 at the foot of Crystal Head, on the south-west of the port. 

 The summit of the head is flat and tabular, and the rocks in 

 the vicinity are described by Captain King as consisting of 

 siliceous sand-stone. Calcedony, apparently from amygdaloid 

 of the trap formation, was also found at Port Warrender. 



The epidote of this place is in general of a pale-greenish 

 colour, but is mixed with, and sometimes appears to pass into, 

 spots of a rich purplish-brown. The specimens resemble ge- 

 nerally the epidote of Dauphiny and Siberia; but Mr. Levy, 

 who has been so good as to examine them, informs me that 

 the crystals exhibit some modifications not described either 

 by Haiiy, or by Mr. Haidinger in his paper on this mineral, 

 and which are probably peculiar to this locality. 



Water Island, on the west side of Cape Voltaire, at the 

 south-west entrance of Port Warrender, is described (vol. i. 

 p. 395) as consisting of quartzose sand -stone ; as is also Kater 

 Island, in Montagu Sound. And the same rock appears to 



occur 



