32 
quartzites of the Prince Regent River may be seen in Fig. 38), 
These sediments lie on a much lower geological horizon than the 
lava hows of Mount Hann. These canons are of great beauty, 
and it is much to he regretted circumstances have prevented many 
of them being photographed. 
Fiy:- 38 
Canon, I’rince Regent River, Kimberley Division. 
b'or a very long period of time there was a danger of our 
geological observations being lost in a mass of detail, and the 
time is rajiidly atiiiroaching when wdiat may be called the histolo- 
gical aspect of the subject, can give place to generalisation. 
The recognition of the positon of the Nullagine b'ormation in 
the geological time scale is a iioint of considerable importance. 
None of the beds, despite the fact that the dolomites are of marine 
origin, have as yet yielded any fossils, hence any correlation of 
the strata will be little else than tentative. The earliest observer, 
Mr. H. P. Woodward assigned a Devonian Age to the formation, 
though the evidence does not seem to be conclusive. The next 
observer, the late Mr. Becher. writes that of "the age and origin 
of these interesting Nullagine beds nothing definite is known.” 
Prof. David infers that the beds are "probably of older Palaeo- 
zoic age ( ? Pre Cambrian.”) 
d'he onlv direct evidence we have bearing on the question of 
their age. is that acquired by my colleague. Mr. 'I'albot, in his re- 
cent cxijlorations in the north. I'he beds of the Nullagine borma- 
tion are seen to jiass unconformably beneath much newer strata in 
the IMterson and Broadhurst Ranges, in the watershed of the 
Rudall River. 
