North of the Atlas Mountains, the land was fertile and well-watered (there is evidence that rainfall was heavier than today and that the desert had not encroached as far north). The Berbers living inside the fertile zone were largely sedentary. In contrast, on the southern fringes existed tribes that led a semi-nomadic existence.
North of the Atlas Mountains, the land was fertile and well-hydrated (there is evidence that rainfall was heavier than today and that the desert had not encroached as far north). The Berbers residing in this region were largely fixed. In contrast, on the southern edges existed tribes that led a semi-migratory existence.