246 



Charles Fenner : 



Brittlebank (ref. G) mentions old channels filled by newer basalts, 

 170-350 feet deep. That gentleman has kindly taken me to see each 

 of these various interesting sections) of old river valleys that he has 

 discovered, in the neighbourhood of *' Dunbar," Myrniong. 



PRESENT EXPOSED 

 NEWER VOLCANIC 



MlUES: 



I C r 



Fig. 15. — Map showing- the extent of the Newer Basalt lava flows, as 

 at present exposed The basalts were originally more extensive, 

 but in places have been eroded away, and in the other places ob- 

 scured by deposition of alluvial materials (Section VIII c). 



Added to these are others found by the writer, and altogether they 

 enable an interesting part of the ancient river courses to be well 

 mapped out. This will be dealt with under the lieading of buried 

 rivers. 



