Coast of Baluchistan, through the appalling sand-wastes of the Mekran.'
Between the arid and sandy northern wastes and the well-watered and arable Sudanese lands there is a transitional zone of level grassy steppes (partly covered with mimosas and acacias) with a mean breadth of about 60 m.
Long (1819) tended to confirm old ideas of sandy wastes west of the Mississippi.
Except in the river valleys it is a poor territory, rough and mountainous towards the south, but subsiding into undulating wastes and pasture-lands towards the Turkman desert, and the Oxus riverain which is highly cultivated.
Elevation, which include some of the most fertile and productive areas in Colombia; the temperate districts between 7500 and 10,000 ft., the cold, bleak and inhospitable paramos between 10,000 and 15,000 ft., and above these the arctic wastes of ice and snow.