-
ice age
and humans appear
- Phanerozoic Eon
- Cenzoic Era
- Neogene Period
- Pleistocene Epoch
-
Phanerozoic Eon
- Cenzoic Era
- Neogene and Paleogene Periods
- Holoccene, Pleisotocene, Pliocene. Miocene, Oligocene, Oeocen and Plaeocene Epochs.
-
Eons
- Hadean*
- Archaean
- Proterozoic
- Phanerozoic
Not recognized by textbook
-
Hadean Eon
Formation of Earth and Solar system 4.6 bill years ago.
-
Archaean Eon
- 3.5 bya prokaryotes appear
- photosynthetic bacteria in sandy stromatolite mats
-
Proterozoic Eon
- 2.1 bya oldest fossils of eukaryotes appear
- Edicaran Period: soft bodied invertebrate animals appear
-
Phanerozoic
- Paleozoic Era:
- Cambrian
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian Periods
-
Cambrian explosion:
sudden increase in diversity of animal phyla
- cambrian period
- Palozoic Era
- Phanerozoic Eon
-
colonization of land by diverse fungi, plants, and animals
- Ordovician Period
- Paleozoic Era
- Phanerozoic Eon
-
Diversification of early vascular plants
- Silurian Period
- Palozoic Era
- Phanerozoic Eon
-
Diversification of bony fish
first tetrapods and insects
- Devonian period
- Paleozoic era
- Phanerozoic eon
-
origin of reptiles and amphibians dominate. first seed plants
- Carboniferous period
- Paleozoic era
- Phanerozoic eon
-
extinciton of many marine and terrestial organisms
- Permian period
- paleozoic era
- Phanerozoic eon
-
dinosaurs evolve and origin of mammals
- Triassic Period
- Mesozoic Era
- Phanerozoric Eon
-
Dinosaurs abundant and diverse; gymnosperms still dominant
- Jurassic Period
- Mesozoic Era
- Phanerozoic Eon
-
Most dinosaurs becme extinct at the end of period; flowering plants appear and diversify.
- Cretaceous Period
- Mesozoic Era
- Phanerozoic Eon
-
major radiation of mammals, birds, and pollinating insects
- Paleocene Epoch
- Paleogene Period
- Cenozoic Era
- Phanerozoic Eon
-
Origins of many primate groups
- Oligocene Epoch
- Paleogene Period
- Cenozoic Era
- Phanerozoic eon
-
apelike ancestors of humans appear
- Miocene epoch
- Neogene period
- Cenozoic era
- Phanerozoic eon
-
origin of genus Homo.
- Pliocene epoch
- Neogene period
- Cenozoic era
- Phanerozoic eon
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