Yol. 65.] NUBIAN SANDSTONE, ETC. SOUTH OF KHARGA OASIS. 47 



exposed on the south side : the dip, which is always directly away 

 from the granites, increasing rapidly from a few degrees until it 

 amounts to as much as 80 D in the beds immediately alongside the 

 igneous rocks. Moreover, the sedimentary beds become most 

 markedly changed as the igneous rocks are approached ; they 

 assume bright hues, and the sandstones become so hard and silicified 

 that only with the greatest difficulty can fragments be detached 

 with a hammer. To my mind the beds show undoubted signs of 

 contact-metamorphism, and there seems no escape from the con- 

 clusion that the sedimentaries here have been thrust up and meta- 

 morphosed by the intrusion of the granites. The outcrops of the 

 tilted beds follow the crystalline exposure in a curve, which alone 

 would appear to negative any supposition that their disturbed state 

 could be accounted for by faulting. The distance from the actual 

 granite to the beds tilted at 80° is not more than 10 paces ; the 

 accompanying figures (2 & 3, pp. 45 & 46) show the general appear- 

 ance of things at this interesting spot. 



F. — This is a big boss of granite forming a hill about a couple of 

 kilometres long, situated immediately adjacent to the high escarp- 

 ment — the continuation of the eastern wall of the Oasis — formed of 

 the fossiliferous shales and limestones belonging to the Senonian 

 and Danian divisions of the Upper Cretaceous. At the western end 

 ■of the hill, brown and purple sandstones are seen dipping steadily 



Pig. 4. — Plan of Exposure F, 48 1 - kilometres south-souili-ecttt of 



Beris (Kharga Oasis). 



W. E. 



.xy 



/,E.L. 



:'^'-^^ :: 5fer^^iiifoy / /^Libyan 



•V : ■ 

 .A 



n.s.-:v. 



I 



1 



[G = Granites, etc. N.S. = Nubian Sandstone Series. ~E.~L. = Exogyra- 

 Limestones. S.D. = Senonian-Dauian Series.] 



away from the crystalline rocks, the inclination reaching a maximum 

 of 45°. The sandstones may be observed in close proximity to the 

 igneous rocks, although the actual point of contact is obscured ; they 

 are fissured and shattered in the most remarkable way. Near the 

 junction, the granite itself is curiously foliated and broken up ; I 

 observed no signs of an eroded surface. 



