North-east of the small town of Kataba, from which it is continued in a northeasterly direction up to the great desert.
Most of the valleys, lakes and sea lochs run in a south-westerly and northeasterly direction, a feature strikingly exhibited in west Argyllshire.
Although the rocks throughout the Southern Uplands have a persistent northeasterly and south-westerly strike, and though this trend is apparent in the bands of more rugged hills that mark the outcrop of hard grits and greywackes, nevertheless geological structure has been much less effective in determining the lines of ridge and valley than in the Highlands.
The frontier now turns east, following for a short distance the course of the river Setit; thence it strikes northeasterly to the Mareb, and from 38° E.
