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GLOSSARY
TIMELINE
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Prehistory
(15 billion years ago to 3,000 BC)
15-12 billion
years ago
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origins of
the universe
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4.5 billion
years ago
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HADEAN
Time: origins of solar system
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origins
of earth |
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PRECAMBRIAN
EON (4 billion to 540 million years ago)
4 billion
years ago
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ARCHEAN
Eon (4-2.5 billion years ago): origins of unicellular life, bacteria,
algae
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2.5 billion
years ago
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PROTEROZOIC
Eon (2.5-0.6 billion years ago): origins of first multicellular
organisms, coral, worms, jellyfish
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570 million
years ago
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Precambrian
Ice Age
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PHANEROZOIC
EON
(includes Paleozoic, Mesozoic and Cenozoic Eras) (540
million years ago to the present)
PALEOZOIC
ERA
(includes Cambrian, Ordovician, Silurian, Devonian, Carboniferous and
Permian Periods) (540-245 million years ago)
Cambrian
Period (540-505 million years ago)
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540 million
years ago
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trilobites
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Ordovician
Period (505-438 million years ago)
505 million
years ago
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fossils of
oldest fish in Early Ordovician Period
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land plant
spores
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Silurian
Period (438-408 million years ago)
438 million
years ago
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early land
animals, fish with jaws, land plants
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Devonian
Period (408-360 million years ago)
408 million
years ago
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insects, amphibians,
forests, fish with fins
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Carboniferous
Period (360-286 million years ago)
360 million
years ago
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Mississippian
and Pennsylvanian periods: swamps, plant remains that would eventually
become coal
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Permian
Period (286-245 million years ago)
286 million
years ago
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final
formation of supercontinent PANGAEA |
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mass
extinctions (e.g. trilobites) toward the end of the Permian Period |
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MESOZOIC
ERA
(Triassic, Jurassic and Cretaceous Periods, 245-66 million years
ago)
Triassic
Period (245-208 million years ago)
245 million
years ago
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early dinosaurs
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earliest mammals
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Jurassic
Period (208-144 million years ago)
208 million
years ago
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continental
drift, Pangaea begins to break apart into Laurasia and Gondwana
toward the end of the Jurassic
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Apatosaurus
(formerly known as Brontosaurus), large, plant-eating dinosaurs
of the late Jurassic
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Cretaceous
Period (144-66 million years ago)
144 million
years ago
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100
million years ago |
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further
continental drift, begins formation of modern continents |
90 million
years ago
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Argentinosaur,
largest land animal (80 ton, 120 ft long)
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88 million
years ago
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Madagascar
splits from India |
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Tyrannosaurus
Rex, Velociraptor, Triceratops
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CENOZOIC
ERA
(includes Tertiary and Quaternary Periods)
(66 million years ago to the present)
Tertiary
Period
(includes Paleocene, Eocene, Oligocene, Miocene and Pliocene Epochs)
(66-1.6 million years ago)
66 million
years ago
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asteroid (10-20
mile diameter) impact?
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extinction
of the dinosaurs and other land animals heavier than
25 kg.
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62 million
years ago
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origin of
lemurs
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34
million years ago |
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separation
of Antarctica from South America, begins formation of Antarctic
ice |
6 million
years ago
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Separation
of Atlantic Ocean and Mediterranean Sea by geologic activity |
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Messinian
Salinity Crisis--evaporation of Mediterranean Sea |
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climate change,
drier conditions, loss of forests in Africa
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5.8-5.2 million
years ago
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oldest
human ancestor, Ardipithecus ramidus kadabba,
hominid fossil remains at Middle Awash, Ethiopia |
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5
million years ago |
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significant
closing of gap between North and South America, increasing salinity
of the Atlantic, cooler and drier weather in Africa |
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oldest mammoth remains, North Africa, 4.8 million
years ago |
4.4 million
years ago
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Ardipithecus
ramidus, hominid fossil remains at Aramis, Ethiopia
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4 million
years ago
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bipedal hominids,
genus Australopithecus
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Lake Turkana
(Kenya) fossils, Australopithecus anamensis
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3.6 million
years ago
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Laetoli (Tanzania)
footprints, Australopithecus afarensis
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3.5
million years ago |
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rise
of Isthmus of Panama, Pacific and Atlantic Oceans separated,
further salinity increases in Atlantic waters, continuing cooler
and drier weather trend in Africa |
3.18 million
years ago
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"Lucy"
fossil remains in Ethiopia, Australopithecus afarensis
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3 million
years ago
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formation
of Arctic polar ice cap
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drier and
cooler Africa, further deforestation
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Australopithecus
africanus, larger brains, more complex human social organization
and modes of subsistence, development of meat eating
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2.6 million
years ago
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oldest
known stone tools (Gona, Ethiopia); beginnings of PALEOLITHIC
(Old Stone Age)
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2.5 million
years ago
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genus Homo
(Homo rudolfensis, Homo habilis)
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1.8 million
years ago
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Homo
erectus, Homo ergaster
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Quaternary
Period
(includes Pleistocene and Holocene Epochs)
(1.6 million years ago to the present)
1.6 million
years ago
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begins PLEISTOCENE
Epoch (1.6 million to 10,000 years ago); cooling climate, Ice
Age
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Saber-toothed tigers (Smilodon californicus)
in America, 4-5 feet long, 450 pounds, 7 inch fangs, extinct by
10,000 years ago, remains in La Brea Tar Pits in Los Angeles |
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Mammoths (13-feet tall, 6-8 tons) in Europe,
America, Asia and Africa, origins 4.8 million years ago (diverged
from African elephants about 6 million years ago), dying out by
end of Ice Age, extinct by 3,500 years ago, except for dwarf species
in Wrangel Island (Russia) survived till 1,500 BC. |
1
million years ago |
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Gigantopithecus
(10-foot tall, 1200-pound ape) in southeast Asia, extinct by 100,000
years ago |
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Java Man (Homo erectus in southeast Asia) |
800,000 years
ago
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earliest known
evidence of human cannibalism in caves at Gran Dolina,
Sierra de Atapuerca (Spain), Homo antecessor, oldest European
hominid
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archaic Homo
in Africa and western Europe, Homo antecessor (800,000
years ago), Homo heidelbergensis (500,000 years ago), likely
ancestors of Neanderthals
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300,000 years
ago
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origins of
Neanderthals (Homo neanderthalensis) in western Europe
(extinct by 28,000 years ago). Mousterian culture, flint tools
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160,000 years
ago
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oldest fossils
of modern humans, Homo sapiens idaltu (Herto, Afar Valley,
Ethiopia)
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150,000 years
ago
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Neanderthals
widespread in Europe and Asia (150,000-35,000 years ago)
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120,000
years ago |
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evidence
of Neanderthal cannibalism, Moula Guercy, France |
100,000 years
ago
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modern
Homo sapiens in Omo, Ethiopia
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50,000 years
ago
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Cro-Magnon
people migrate out of Africa
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beginnings
of brain lateralization, symbolic thought, language ability |
35,000 years
ago
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Cro-Magnon
people (35,000-10,000 years ago) in Dordogne (France)
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beginnings
of migrations of humans from Asia to America across the Bering
Strait
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32,000 years
ago
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Chauvet Pont-d'Arc
cave paintings (32,000-30,000 years ago), France
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28,000 years
ago
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Neanderthals
extinct
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27,000 years
ago
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Venus of
Willendorf figurines (27,000-20,000 years ago)
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15,000
years ago |
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begins
MESOLITHIC Age |
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Lascaux
cave paintings, France |
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Altamira
cave paintings, Spain |
13,000
years ago |
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oldest
Native American petroglyphs |
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Younger
Dryas ("Big Freeze") -- glacial weather in Northern
Hemisphere, ending about 11,500 years ago |
11,000 - 10,000
years ago
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end of Pleistocene
Epoch and Ice Age; beginnings of HOLOCENE Epoch
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beginnings
of NEOLITHIC AGE |
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Neolithic
Age (10,000-3,000 years ago)
11,000
- 10,000 years ago (9,000 - 8,000 BC) |
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End
of Ice Age, beginnings of Neolithic Age |
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invention
of agriculture, cultivation of plants and domestication of animals
in southwestern Asia |
8,000
- 7,000 BC |
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walled
town, Jericho |
7,000 BC
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agriculture
and villages in Mesopotamia
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6,500 BC
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use of copper
in Anatolia (Turkey)
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earliest evidence
of religious practices: fertility cults, goddess figures at Çatal
Huyuk (Turkey)
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5,000 BC
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Great Flood,
formation of the Black Sea
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Sumerians
(5,000-2,000 BC) in Mesopotamia
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4,000 BC
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Sumerian city
of Eridu (before 4,000 BC)
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3,300 BC
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invention
of writing by Sumerians in Mesopotamia, wheel, plows |
3,000
BC |
end of prehistoric
period
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Prehistory
( 15 billion years ago to 3,000 BC)
Antiquity
(3000 BC to 476 BC)
The
Middle Ages (476 BC to 1450 AD)
The
Renaissance (1450 - 1650)
The
Enlightenment ( 1650 - 1770)
Romanticism
(1770 - 1832)
The
Realist Age (1832 - 1880)
Modernism
(1880-1950)
Postmodernism
(1950 - present)
Last
updated:
08/14/2006
©
2001-2006 by Fidel Fajardo-Acosta,
all rights reserved
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