118 



GEOLOGY MAITLAND-BRANXTON DISTRICT, 



origin. As a new and extensive occurrence of the glacial beds has 

 recently been described from the Kempsey District,* it would per- 

 haps be as well to leave any further discussion of them until that 

 area has been more fully worked out. 



This stage is followed by an enormous development of marine 

 sandstones and mudstones, with which are associated a number of 

 contemporaneous lava-flows. There are, first, about 400 feet of 

 gritty, ferruginous mudstone, followed by a flow of basalt, 50 feet 

 thick, in which numerous small steamholes have become filled with 

 secondary minerals, such as analcite, natrolite, calcite, etc. 



T 



I 

 I 



in 





ft 



Jooo 



2000 



mrrrn 



GRETA COAL MEASURES 



JSO 



Rather Soft orrtty Sandstone 

 4U 



NaW.itt basalt pnu*j Ur v*r<J< mbluffs wifti marine fossils 



Massiw SanJtTont („.w,d, t. mtki*i «•» (Uvmifwld S*nd«1»n«) 

 15* 



Cherty Shales with mmute sporangia 



Soft Mudtfann 



Dacife ef« (CARBONIFEROUS) 



Fig. 3. —Vertical Section obtained along Eelah Road. 



Then come 700 feet of rather hard shales and mudstones, which 

 contain a few erratics, followed by a basalt-flow, 150 feet thick. 

 This is followed by 1,300 feet of shales and mudstones, which also 

 contain a few erratics, and near the top of which, there are numer- 

 ous small patches of calcareous sandstone. About 100 feet above 

 the basalt, the shales are somewhat cherty, and contain veins filled 

 with a red secondary material, probably chalcedony. 



* W. G. Woolnough, Journ. Proc. Royal Soc. N. S. Wales, 1911, xlv. 

 pp. 159-168. 



