BY E. O. MARKS, B.A., B.E. 143 



of the neighbourhood. Some distance further down the 

 creek, a similar sandstone is seen resting on basalt. Owing 

 to circumstances, a detailed examination could not then 

 be made, but the section thoroughly convinced the writer 

 of the Trias-Jura age of the basalt in that locality. The 

 absence of detailed examination or of fossil evidence regard- 

 ing the sandstone and carbonaceous beds forms but a slight 

 flaw in the otherwise absolute proof, since undoubted 

 Trias-Jura strata occur, with coal seams, on Widgee Creek, 

 less than two miles aw^ay, and the same formation appears 

 to extend throughout the intervening ground. The 

 vertical position of the strata, moreover, does not accord 

 with thp comparatively undisturbed character of the 

 Tertiary formations elsewhere. 



The sandstone and included basalt is presumably on 

 the same horizon as that observed by Mr. Rands, and 

 ascribed by him to the Desert sandstone. Since the time 

 of Mr. Rand's observations several areas which had been 

 attributed to the Desert sandstone on physical grounds — 

 the only data available — have since proved to be of greater 

 age. It is more than probable, there being no evidence 

 to the contrary, that the sandstone observed by Mr. Rands 

 is of Trias-Jura age, like the remainder of the sandstone 

 in its neighbourhood. 



A paper on the Volcanic Eruptives of West Moreton, 

 by R. A. Wearne and W. G. Woolnough, to the former 

 of whom the field work was due, was read before the 

 Sydney meeting of the Australasian Association for the 

 Advancement of Science in January this year, but has 

 not yet been published. The authors consider that there 

 are, in all probability, two volcanic series : — 



(1) Of Trias- Jura age, contemporaneous with the 



Walloon stage of the Trias- Jura ; 



(2) Of Tertiary age. 



The former of these includes the normal trachytes, 

 andesites and basalts of the Main Range ; the latter includes 

 the more alkaline trachytes (comendite and grorundite) of 

 Mt. French, Mt. Greville, etc., the rhyolites of Mts. Maroon 

 and Barney, and the basalts of the Toowoomba Range. 



Proof of the Trias-Jura series lay in the discovery of — 

 (1) Trachyte tuff containing Taeniopteris Daintreeit 

 found in the Lockyer district, near the Maia 

 Dividing Range (near Mt. Mistake) ; 



