00 VOCLANIC AREA OF EAST MORETON, ETC., DISTRICTS, Q., 



to rest unconformably on black slaty-looking rocks ^78-m.peg.: 

 Text fig.llB). The latter are very contorted and contain quartz 

 veins, but are, however, unlike any of the Palaeozoic rocks. 

 There are chocolate shales belonging to the same series, not 

 unlike some of the Kin-Kin rocks. These rocks are probably 

 carbonaceous shales and tuffaceous mudstones of Trias-Jura or 

 later age, altered by the vast outpourings and injections of 

 rhyolite and monzonite, with which the quartz veins are probably 

 connected. 



(b) Sedimentary Bocks. — The Trias-Jura sandstones are un- 

 fossiliferous except for petrified wood. They vary from gritty 

 varieties and conglomerates to fine-grained felspathic varieties. 

 The tuffaceous sandstone with carbonaceous bands at Eumundi 

 is probably later than the typical sandstones met with further 

 eastward on the coast, and to the south at Nambour. Faulting 



em. 



<=■? 



■ t fc8. 





* 



&7 





<=6 



■i 



'■>i" x 



YANDINA 



1 NIHKOOCHV R. 



soil 



i;j, NC at 2o - 





^f?t 





WM 







' T 

 NAiwaoun-l 



.- 



—w&& 



'' '■■{.'!:: 



M'r* *""'■" ~ 



a.-t. " 





s > s ■* - 



a 





a 



* f- 



aU. 



i T 



T. T. t. S 



c.s. chocolate and black slaty shales, r. rhyolite. v. tuffaceous sandstone. 

 a. andesite. b. felspathic sandstone with diorite boulders, f.s. felspar sand- 

 stone, t. trachyte, c. coal. s. sandstone. 

 Fig. 11. -Sections along railway, Yandina-Nambour, and Eumundi-Cooroy. 



has here preserved the later formations. A good example of fault- 

 ing may be seen in a cutting at the Eumundi railway goods-shed 

 (Text fig. 6). Fragments of sandstone are included in the 

 breccias between Yandina and Nambour as at the 69^-mile peg 

 (Plate ix., and Text fig. 1 1a). A curious fault-breccia, supposed to 



