RECORDS OF W.A. MUSEUM. 
l73 
extend to Jasper and Timber Creeks off the Victoria River, 
where the beds have been recognised by Mr. H. Y. L. Brown. 
In due course, when the mapping of the beds is extended, it 
it will probably be joined up to the Cambrian Limestone of Flora 
river, the Katherine river, and the Daly river valley, and the 
other localities further ea.st and south in the Northern Territory and 
Central Australia. 
'I'he exact localisation of these Cambrian beds will have a pro- 
found effect upon the Geological mapping of this State. When the 
matter has been further worked out it will doubtlessly be found 
necessary to regard most of the beds marked “ S ” on the eastern 
half of Dr. Jack’s map of igo6 as of Ordovician age^. Beds mapped 
as “ D ” would become pre-Cambrian ^ to distinguish them from 
the still older metamorphics (M) which might be regarded as 
Archaean®. 
The Cambrian Limestone beds of Northern Australia, extend- 
ing from the Elvire river near the north-western extremity of the 
Hardman Range to the Daly river (Noltenius Billabong) and 
Alexandria Cattle Station in the Northern Territory are thus seen 
to present a remarkable uniformity of character throughout the 
course of their outcrops, and to be almost, if not quite, horizontally 
bedded wherever they appear at the surface. 
NOTE BY THE EDITOR. 
19th March, igi2. 
I have just received the following communication from 
Dr. F. A. Bather, F.R.S., Assistant Keeper of Geology in the 
British Museum : — 
1 Mr. Talbot has found similar beds to the south of those just mentioned, they 
extend from lat. 23deg. S. to 25deg. S-, with two smaller patches further 
south. 
2 Mr. H. W. B. Talbot has shown that beds similar to these, and also horizon- 
tally bedded, extend southwards to lat. 23deg. S., long. i24deg. E. 
(Bulletin No. 39). 
3 A band of these ancient metamorphic rocks was seen by Mr. Talbot to cross 
his route and extend from Mt. Methwin to Lake Nabberu, a little to 
the north of Wiluna. 
