The physiography of the river Nile and is basin . Hayuda desert, while on the Berberside it is nearlv halfway to Suakin before hills rising to l:iOO metresare met with. The desert to the east of Dongola and \Vadi Haifa isgenerally from 400 to 600 metres above sea level while a few hills riseto 1000 and 1200 metres ; to the west the desert is flatter and thegeneral altitude rarely exceeds 500 metres. There has not as yet been any ver\- systematic geological examina-tion of this part of the desert. In general there is a series ofcrystidline rocks represented by gneiss, gi-anite, and schists, whi
The physiography of the river Nile and is basin . Hayuda desert, while on the Berberside it is nearlv halfway to Suakin before hills rising to l:iOO metresare met with. The desert to the east of Dongola and \Vadi Haifa isgenerally from 400 to 600 metres above sea level while a few hills riseto 1000 and 1200 metres ; to the west the desert is flatter and thegeneral altitude rarely exceeds 500 metres. There has not as yet been any ver\- systematic geological examina-tion of this part of the desert. In general there is a series ofcrystidline rocks represented by gneiss, gi-anite, and schists, while incertain places there is a large development of hornblendic rocks. Onthis highlv eroded old land surface the beds of the Nubian sandstonehave been laid down, without, so far as is known at present, any olderpre-cretaceous rocks occurring. It may be that a conglomerate largelydeveloped at Jebel Reft near the Murrat Wells between Korosko andAbu Hamcd, mav represent some of these and it is too soon to say z< en < o <I -I It- U5 111 II-. o -o .
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectwatersupply, bookyear
