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(b) The investigations carried out on what may be called 
the Auriferous Series, as developed on most of our goldfields, has 
shown that an intimate relationship subsists between the in- 
trusive granite masses and the auriferous quartz veins and other 
allied mineral deposits. 
(c) Having due regard to the extent of these old rocks and 
the fact that Western Australia has been remarkably stable and 
quiescent since early Palaeozoic times, the State may be said to 
possess almost limitless mining possibilities. 
(d) The stratigraphy of that important formation, the 
Nullagine Series, has now been clearly defined. This formation 
consists of a great thickness of quartzites, sandstones, con- 
glomerates and dolomites, together with a series of lavas, ashes 
and agglomerates of as yet unascertained thickness. The dolo- 
mitic limestones of the Nullagine Series afford evidence that a 
large portion of Western Australia north of Lat. 26° has been 
subject to marine conditions, and point to a more or less pro- 
longed submergence during a very early period in the Earth’s 
history. The Nullagine Series is of some economic importance 
by reason of the fact that its basal members have proved to be 
auriferous in two localities. In many important respects these 
gold deposits bear a striking resemblance to those celebrated 
auriferous conglomerates of the Rand, in South Africa, better 
known, perhaps, as the Banket Deposits. The series is also of 
importance, owing to the fact that the soil derived from the 
volcanic beds produces that excellent pastoral country which 
occurs in the recesses of the Hamersley Range. 
(e) The question of the geological age of the Collie River 
Coal Measures, which was formerly more or less obscure, has 
now been very clearly settled by a careful investigation of the 
organic remains associated with the strata ; a result which adds 
considerably to our knowledge of the important scientific question 
of the distribution of the Glossopteris Flora. 
(/) One of the most important advances in Western Austra- 
lian geology is the recognition of a glacial conglomerate in the 
Marine Permo-Carboniferous Rocks, near the Tropic of Capricorn. 
This conglomerate, which forms a very valuable stratigraphical 
horizon, lias been traced across countiy for nearly 200 miles, 
and is exposed in the valleys of the Minilya, Lyndon, Lyons, 
Arthur, Wyndham, Wooramel, and Irwin Rivers. ~ The scientific 
interest attaching to this deposit lies in the fact that it marks 
the prevalence of intense cold, and a distinct glacial epoch, which 
there are sound geological reasons for believing to be contempo- 
raneous with the glaciation that affected India, South Africa, 
the Argentine, the Falkland Islands, and other portions of 
Australasia in Permo-Carboniferous times. 
(g) The recent recognition of another Mesozoic horizon, viz., 
the Cretaceous chalk at Gingin, makes an important advance in 
