KAHUN PLATEAU. 1]$ 



Groups. Feet. 



»j e ( Keddish nud white, coarse, speckled sandstones, thick-bedded, with ) 



I red shaly alternations ... ... ... ,^. j 



'Greenish and white sandstones, tvith black shales ; sometimes coaly, 

 pyritous and ferruginous nodules large and numerous ; fucoids I 



^°- ^--i on surfaces ... ... > 200 



^Lumpy, gravelly, conglomerate ; pebbles of crystalline rocks 

 No. 3. — Dark shaly beds ... ... ... ... .. jqO 



jj 2 f Dark red or purple sandstone, alternating below with layers of red ) 



1 shale; generally earthy beneath, near junction with next group.' 



No. 1. — Gypseous, red salt-marl ... ... _. ^ gQQ 



250 



Nearly below the old Makrach customs-bungalow standino- on the 

 cliff edge, there is a thin band of red flaggy sandstone, apparently at the 

 base of No. 1 in the above section, which may possibly be one of the 

 last remnants of the salt-crystal zone. No. 8. Some other thin red rocks 

 have been before mentioned high in the series, on the opposite side of 

 the glen, under Nila, and eastward ; but in the sections to the west all 

 traces of this band are unknown. 



In the western branch of the Makrach glen, along which a fault 



^ ^^ - „ , appears to pass towards Kalar-Kahar, the sections 



West branch oi glen. 



are in places concealed by slips and by accu- 

 mulations of calcareous tufa, as near Malkana; but light-coloured 

 sandstone beds, of the aspect of the magnesian group, still divide the 

 series. Dark shales occur both above and below these sandstone beds, 

 the upper band, of about fifty feet, having some six alternations of sand- 

 stone and shale. The sandstones were estimated at from 250 to 300 feet 

 and the dark shales below at 100 feet. Underneath the latter are, first, the 

 " purple sandstone,^^ and then the " red salt-marl.^-' Over the lio^ht- 

 coloured sandstones is as great a thickness of coarse white, reddish 

 and speckled, strong-bedded sandstone, with red shaly layers. This 

 is group No. 5. Above it the talus of the nummulitic limestone 

 chff greatly conceals the beds, but there is room for both the coal-shales 

 and the diminished " olive group. ^* 



The red salt-marl occupies the whole interior of the Makrach valley, 



and the gorge which leads from it south-west- 

 Salt-marl. " ° 



wards. Small portions of the marl occur in the 



( 173 ) 



