Where do you find most of the primate fossils from the Oligocene epoch?

The Fayum Depression in Egypt is a significant site for Oligocene epoch primate fossils due to its rich and well-preserved deposits that date back to this period. This area has provided crucial evidence of early primate evolution, including a variety of species that offer insights into the characteristics and lifestyles of these ancient animals. The fossils found here highlight a diverse array of primates, including early anthropoids, which are key to understanding the evolutionary lineage leading to modern primates.

In contrast, while East Africa is known for its rich hominin fossil record, especially from the Miocene and later periods, it is not as prominent for Oligocene fossils specifically. North America and South America are also not notable for Oligocene primate fossils, as the fossil records from these regions are less extensive for this epoch compared to the Fayum Depression, making it a unique and vital location for studying the early stages of primate evolution.