• - 1 Iraqw Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area Mbulu people
• Iraqw
• - 1,000 Original Khoi-San hunters and gatherers are disturbed Ofcansky, Thomas P and Yeager, Rodger Historical Dictionary of Tanzania pre-history
• - 8,000 Stone Bowl people Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• Pastoralists
• - 17,000 homo sapiens Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 100,000 to 0 Ndutu bed Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 100,000 to -30,000 faulting at Olduvai Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 150,000 Tanzania, Ethiopia origin for humans Rincon, Paul Tanzania, Ethiopia origin for humans Dr Sarah Tishkoff
• - 400,000 to -100,000 Masek beds Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 800,000 Climate improves Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 1,200,000 homo erectus Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 1,500,000 Lake Olduvai drains Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 1,750,000 Australopithicus boisei Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 1,890,000 Olmoti erupted Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 2,000,000 Main features of the area now formed Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 2,500,000 Ngorongoro collapses Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• Ngorongoro
• - 2,500,000 Manyara rift is formed Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 3,600,000 Sadiman and Laetoli footprints Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area Laetoli
• pre-history
• - 15M Early rift Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 20M the Great Rift Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• - 70,000,000 African continent Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• -100000? Parasitic cones and craters Nyamweru, Celia Oldoinyo Lengai Web Site Ol Doinyo Lengai
• -200M Pangaea Hanby, Jeannette & Bygott, David Ngorongoro Conservation Area pre-history
• -370000 Oldoinyo Lengai is young Nyamweru, Celia Oldoinyo Lengai Web Site Ol Doinyo Lengai