SON PLATEAU. 235 



broken portions of the speckled and reddish sandstone or carboni- 

 ferous groupS; one little triangle being occupied by triassic beds. 



Just within the mouth of the gorge the crushed and broken rocks 

 exhibit some most complicated folding, and the 

 beds above the " purple sandstone " differ some- 

 what from the usual aspect of the " speckled sandstone " group ; the 

 following succession being observed : — 



Groups. Feet. 



TBright red aluminous beds ... ... ... 30 



I Greenish, greyish, and white flaggy sandstones and sandy 



I shale with some red bands ... ... .. 100 (?) 



(^ Hard white sandstone and grey shales ... ... 30 



No. 3?. Greenish grey, sandy, shaly, soft beds ... ... 50 



^DuU purple sandstone ... ... 80 to 100 



Purple shaly and earthy part of the group ... 60 to 80 



No. 1. Kedsalt'marl ... ... ... ... 80 



No. 2. i 



This is on the west side of the gorge. A little further on, an isolated 

 block of the carboniferous limestone, 40 feet in width, projects from 

 the red salt-marl. Near this place, where the bottom of the gorge is 

 occupied by the red marl, the purple sandstone forms the lower 

 part of the right bank, and a slipped or faulted portion of the same 

 occurs on the left, running in between masses of the carboniferous 

 beds, which in this part of the gorge almost everywhere form its left 

 side. 



The second stream of any size above the mouth of the gorge on this 



side, enters the main one from a little valley, the south-west side of 



which is formed of the carboniferous limestone, dipping north-east at 



45° and 50°, and the opposite side chiefly of limestone debris. About 



three-quarters of a mile up this smaller valley is 

 Salgi coal locality. 



the Salgi coal locality."^ 



* Described at page 15 of Dr. Oldham's " Memorandum on the results of a cursory 

 examination of the Salt Eange, &c.," previously referred to. 



( 235 ) 



