From the angularity of many of the pebbles in the conglomerate 
it may he reasonably inferred that the coast-line which furnished 
them was not far distant, and in all probability the present boun- 
daries of the series approximately marks the original shore line. 
What I believe to lie an outlying patch of the Nullagine I’or- 
mation occurs at Mt. Yagahong. near AFeekatharra. Ifere the 
beds which are practically horizontal, rest upon a granite floor. 
Yhe basal bed is a thin conglomerate made u]) of pebldes of granite, 
above which, as may be seen in the cliff sections are a series of 
dark fine-grained sedimentary rocks. (Fig Id). The beds of 
the King Leopold Idatean. wherever I have had an opp{)rtLmity of 
examining them, everywhere exhibit a remarkably uniform sand- 
stone facies, indicating but little change in sedimentation in this 
portion of the State, at this period. 
Fig. i6. 
Sedimentary Beds. Mount Vagafiong, Murchison Goldfield. 
IJefore the close of the period represented by the conglomerate 
and bonlder beds to which reference has just been made, volcanic 
activitv commenced in that portion of Western Australia now 
occupied l)y the Xnllagine h'ormation. I'roin numerous and widely 
se])aratc(l centres of oruiition. of which the remains at present 
