32 P7\)ceedings of the Royal Society of Victoria. 



Boggy Creek is, as we have indicated, an error. There is no 

 break in the series, both sets of strata, though differing litho- 

 logically, being on the same geological horizon. According to 

 the views now current concerning the age of the Australian 

 tertiaries, the deposits are classed as eocene and not miocene. 



VII. — MoiTUN Creek. 



This, the extreme westerly section examined, is the most 

 typical one from which ironstone casts belonging to the older 

 group of the Mitchell tertiaries have been obtained. As already 

 stated, Moitun Creek enters the JVIitchell River just at its great 

 eastern bend. At this junction the river Hat is 108 feet above 

 sea level. A fine section here (Fig. 7) shews towards its base 

 hard yellow sandstone and then sand and drift with fossiliferous 

 ironstone in layers up to a height of 113 feet. Resting upon the 

 topmost ironstone layer there is about 17 feet of gravel wash, 

 with stones in it as much as 6 inches in diameter. The summit 

 of the cliff is 140 feet above the river, but the country still rises 

 and heavy gravel washes may be traced up to a height of 200 

 feet. Our chief collecting ground was not at the junction, but 

 about half a mile west, on the south bank of Moitun Creek. A 

 section at Morrison's Bluff, which rises steeply from the margin 

 of the creek (Fig. 8), reads thus : — 



Surface soil and gravel 



Massive conglomerate - - - - 



Ironstone layers, with fossils and sandy drift 



Pebbly gravel ----- 



Yellow sandy clay - . - - 



Ironstone, highly fossiliferous 



Pebbly cemented gravel - - - • 8 



Fine yellow sand, with ferruginous pipes and 



talus -------50 



Total 110 feet. 



A few chains further west, and close to the road over Moitun 

 Creek, leading to Iguana Creek, the tertiaries rest directly on 



