Another stretch of marsh usually cuts off the northernmost part of the lake from the central sections.
At this point also the two rivers are connected by a canal, the northernmost of a series of canals which formerly united the two great waterways, and at the same time irrigated the intervening plain.
On its northern side the valley of Borotala is skirted by the important orographic system of the Dzungarian Ala-tau, the northernmost member of the Tian-shan.
The fauna of Liberia is sufficiently peculiar, at any rate as regards vertebrates, to make it very nearly identical with a "district" or sub-province of the West African province, though in this case the Liberian "district" would not include the northernmost portions of the country and would overlap on the east and west into Sierra Leone and the French Ivory Coast.
Large animals, such as the black and the grizzly bear, and deer are found on the slopes of the Sierra Mountains, and antelope, deer and elk visit the northernmost valleys in the winter.
