1 76 QEOLOGY. 



SECTION V. 



ANTALO LIMESTONES. 



Next above the sandstone in ascending order is a thick 

 group of limestones, which, rest upon the Adigrat beds 

 at Mai Dongolo in the manner described in the last 

 section, and thence cover the country for a distance of 

 seventy miles along the route, as far as about twenty 

 miles south of Antalo. They extend also for a very 

 considerable distance east and west. 



For twenty miles south of Dongolo the limestone is 

 not accompanied by any other rock. It is usually in 

 thin beds of a grey colour, less commonly ochreous, 

 and it much resembles some of the beds of lias lime- 

 stone in the south-west of England. The rock, when 

 broken, is compact and earthy, or but slightly crystalline 

 in general. 



Further south, towards Antalo, although limestone is 

 still the prevailing rock, some beds of sandstone and of 

 trap are interstratified ; the former especially prevailing 

 towards the upper part of the group. The hill of Gutba 

 Hariat, behind Antalo town, appears to be in great 

 measure composed of sandstone ; and so are the beds 

 immediately beneath the trap in the Meshek valley, south 



