The Kariandusi archaeological site is amongst the first discoveries of Lower Paleolithic sites in East Africa. There is enough geological evidence to show that in the past, large lakes, sometimes reaching levels hundreds of meters higher than the Present Lake Nakuru and Elementaita, occupied this basin. Dating back between 700,000 to 1 million years old, Kariandusi is possibly the first Acheulian site to have been found in Situ in East Africa. Dr. Leakey, a renowned paleontologist, believed that this was a factory site of the Acheulian period. He made this conclusion after numerous collections of specimens were found lying in the Kariandusi riverbed.