Between Thebes and Khartum the western banks of the Nile are composed of Nubian Sandstone, which extends westward from the river to the edge of the great Libyan Desert, where it forms the bed rock.
Arius, a Libyan by birth, of Antioch by training (though earlier than the greatest days 'of that theological school), and a presbyter of Alexandria, represents the working of Aristotelianism.
It required a strong hand to curb the Libyan chieftains, and divisions soon began to show themselves in the kingdom.
Cyrene was the first city to arise, being founded among Libyan barbarians by Aristotle of Thera (later called Battus) in the middle of the 7th century B.C. (see Cyrene).
The Tanite dynasty may have risen from a Libyan stock, though there is nothing to prove it; the XXIInd Dynasty are clearly from their names of foreign extraction, and their genealogy indicates distinctly a Libyan military origin in a family of rulers of Heracleopolis Magna, in Middle Egypt.
The Cephisian marsh was one scene of man's birth according to a fragment of Pindar, who mentions Egyptian and Libyan legends of the same description.
SYNESIUS (c. 373 - c. 414), bishop of Ptolemais in the Libyan Pentapolis after 410, was born of wealthy parents, who claimed descent from Spartan kings, at Cyrene between 370 and 375.
This work is little more than a sailor's handbook of places and distances all round the coast of the Mediterranean and its branches, and then along the outer Libyan coast as far as the Carthaginians traded.
Their leaders were Inaros the Libyan of Marea and the Egyptian Amyrtaeus.
The Nubian sandstone borders the Libyan desert on the south and south-west, but it is doubtful if this sandstone is of Cretaceous or earlier date.