229 



is a depression occupied partly 

 by the Old Mundowey Station 

 (and Ukolan on Hall's Creek), 

 in which the rocks are phyll- 

 ites, silicified tuffs, lenticular 

 masses of limestone, the two 

 latter apparently of Lower 

 Middle Devonian age, a con- 

 glomerate, recalling conglom- 

 erates occurring west of Nun- 

 die, and a long band of ser- 

 ! pentine, which has a maximum 

 width of half-a-mile, and 

 strikes due north, forming an 

 acute angle with the direction 

 of the main Serpentine Line. 

 East of this low region, the 

 land rises rapidly to a height 

 of about 3600 feet. The face 

 of the scarp is composed of an 

 intimate mixture of phyllites 

 and jaspers, with probably 

 Middle Devonian banded 

 cherts and altered tuft's, 

 broken by faults and much 

 contorted. Above the scarp, 

 with its rugged valleys and 

 waterfalls, the land-surface is 

 generally undulating, with 

 poor outcrops of the same 

 types of rocks as formed the 

 scarp. Two miles to the east, 



* Generalised Section from the 

 New England Plateau through the 

 Nandewar Mountains to the West- 

 ern Plains. 



Text-tig. 1, 



