Introduction
Paragraph
I. Hadean Eon
II. Archean Eon
III. Proterozoic Eon
IV. Phanerozoic Eon
IV.a. Palaeozoic Era
IV.a-1.) Cambrian Period
IV.a-2.) Ordovician Period
IV.a-3.) Silurian Period
IV.a-4.) Devonian Period
IV.a-5.) Carboniferous Period
IV.a-6.) Permian Period
IV.a-6A.) Cisuralian Epoch
IV.a-6B.) Guadalupian Epoch
IV.a-6C.) Lopingian Epoch
IV.b. Mesozoic Era
IV.b-1.) Triassic Period
IV.b-1A.) Lower/Early Triassic Epoch
IV.b-1Aα.) Induan Stage
IV.b-1Aβ.) Olenekian Stage
IV.b-1B.) Middle Triassic Epoch
IV.b-1Bα.) Anisian Stage
IV.b-1Bβ.) Ladinian Stage
IV.b-1C.) Upper/Late Triassic Epoch
IV.b-1Cα.) Carnian Stage
IV.b-1Cβ.) Norian Stage
IV.b-1Cγ.) Rhaetian Stage
IV.b-2.) Jurassic Period
IV.b-2A.) Lower/Early Jurassic Epoch
IV.b-2Aα.) Hettangian Stage
IV.b-2Aβ.) Sinemurian Stage
IV.b-2Aγ.) Pliensbachian Stage
IV.b-2Aδ.) Toarcian Stage
IV.b-2B.) Middle Jurassic Epoch
IV.b-2Bα.) Aalenian Stage
IV.b-2Bβ.) Bajocian Stage
IV.b-2Bγ.) Bathonian Stage
IV.b-2Bδ.) Callovian Stage
IV.b-2C.) Upper/Late Jurassic Epoch
IV.b-2Cα.) Oxfordian Stage
IV.b-2Cβ.) Kimmeridgian Stage
IV.b-2Cγ.) Tithonian Stage
IV.b-3.) Cretaceous Period
IV.b-3A.) Lower/Early Cretaceous Epoch
IV.b-3Aα.) Berriasian Stage
IV.b-3Aβ.) Valanginian Stage
IV.b-3Aγ.) Hauterivian Stage
IV.b-3Aδ.) Barremian Stage
IV.b-3Aε.) Aptian Stage
IV.b-3Aζ.) Albian Stage
IV.b-3B.) Upper/Late Cretaceous Epoch
IV.b-3Bα.) Cenomanian Stage
IV.b-3Bβ.) Turonian Stage
IV.b-3Bγ.) Coniacian Stage
IV.b-3Bδ.) Santonian Stage
IV.b-3Bε.) Campanian Stage
IV.b-3Bζ.) Maastrichtian Stage
IV.c. Cenozoic Era
IV.c-1.) Palaeogene Period
IV.c-1A.) Palaeocene Epoch
IV.c-1Aα.) Danian Stage
IV.c-1Aβ.) Selandian Stage
IV.c-1Aγ.) Thanetian Stage
IV.c-1B.) Eocene Epoch
IV.c-1Bα.) Ypresian Stage
IV.c-1C.) Oligocene Epoch (35 to 33 MYA)
[24-27 MYA] Proconsul hamiltoni
IV.c-2.) Neogene Period
IV.c-2A.) Miocene Epoch [23.03 to 5.333 MYA]
Original divergence of the human, chimpanzee, and gorilla lineages, about 13 MYA.
IV.c-2Aα.) Antiquanian Stage [23.03 — 20.04 MYA]
IV.c-2Aβ.) Burdigalian Stage [20.04 — 15.97 MYA]
IV.c-2Aγ.) Langhian Stage [15.97 — 13.82 MYA]
IV.c-2Aδ.) Serravallian Stage [13.82 — 11.63 MYA]
IV.c-2Aε.) Tortonian Stage [11.63 — 7.246 MYA]
IV.c-2Aζ.) Messinian Stage [7.246 — 5.333 MYA]
IV.c-2B.) Pliocene Epoch [5.333 — 2.58 MYA]
Interbreeding between the human and chimpanzee lineages ends possibly as recently as 4 MYA.
IV.c-2Bα.) Zanclean Stage [5.333 — 3.6 MYA]
IV.c-2Bβ.) Piacenzian Stage [3.6 — 2.58 MYA]
IV.c-3.) Quaternary Period
IV.c-3A.) Pleistocene Epoch [2.588 MYA — 11.7 KYA]
2,588,000 to 11,700 years ago.
IV.c-3Aα.) Gelasian Stage [2.58 — 1.8 MYA]
IV.c-3Aβ.) Calabrian Stage [1.8 MYA — 781 KYA]
IV.c-3Aγ.) Ionian Stage [781 KYA — 126 KYA]
IV.c-3Aδ.) Tarantian Stage [126 KYA — 11.7 KYA]
IV.c-3B. Holocene Epoch