GEOLOGICAL lE-iTURES OF ANSESLEV BJV. 19 



Bel .1.- proceeding to describe any part of my subse- 

 quent journey, a brief sketch of some of the geological 

 features observed in the neighbourhood of the landing- 

 place may be given. 



The eastern shore of Annesley Bay appears to consist 

 mainly, if not entirely, of volcanic rocks. The island of 

 Dissi. however, at the entrance of the bay, is entirely 

 composed of metamorphics, the strike of which is nearly 

 north and south. 



The high range of Gadam, the peaks of which are 

 about 3,000 feet above the sea, rises sharph- from the 

 west shore of the bay near its entrance, and is entirely 

 composed of metamorphic rocks, with the same general 

 strike as DissL The hill is comparatively isolated, the 

 usual road from Zulla to Arkiko passing behind it. At 

 the base of the main range of the Abyssiuian highlands 

 a few miles farther west, the rocks near Hadoda, at the 

 entrance to the Haddas pass, consist of mica-schist and 

 homblend schist. At Wia granitoid gneiss occms. 

 These rocks have a low dip to west-south-west, variable 

 in amount, but not exceeding 30° or 40°. 



Between Hadoda and the southern portion of the 

 Gadam range there is an alluvial plain covered with sand 

 and gravel, evidently deposited by the torrents from the 

 lulls. Between this and the coast plain around Zulla 

 a low spur extends for some miles from the south end 

 of the Gadam range, composed of volcanic rocks, similar 

 to those forming the low hills already mentioned 

 near Zulla. Through these the Haddas torrent cuts 

 a small gorge, with precipitous basaltic cliffs of no 



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