Today, the fayum of egypt is a desert. oligocene deposits have produced numerous fossil primates. the paleoenvironmental evidence suggests that during the oligocene the fayum was a:

Primate fossils found in Oligocene deposits suggests that the climate was wetter than it was today. Primates normally thrive in a tropical or subtropical environment. These environments support a diversity of flora that supports the diets of primates. They do not dwell in desert regions like the present environment of the Fayum Desert.