Archaean 

 Complex. 



Mesozoic 

 Sediments. 



Plateau Aden Series of Gypsum Saline 

 Lavas. Lavas, etc., and Deposits Deposits^ 

 Volcanoes. v y 



Plain of Salt. 



Geological Sketch-map of Parts of Eritrea and Abyssinia. 

 Scale, 1 inch — 34 miles. 



