There is a good article in American Scientist Dec. 1996 on H. Erectus. He
appeared in Georgia SSR around 1.6 Myr, in Java around 1.7 and Africa around
1.8. There is also a possible find of him in Spain at 1.8
Australopithecus is first found in rocks dated 5.5 MYR The youngest is the
Taung child at around 800,000. If you want references I can get them. This
is from off the top of my head.
Foundation, Fall and Flood