Geologic Timeline .

precambrian time

Nov 6, 1901

4.6 billion- 544 million
G-Earth forms
B-First Mass extiction occurs at the end of precambrian

Paleozoic - Cambrian

Nov 6, 1902

544 - 505million yaers
G- shallo seas cover the land
B- Invertebrates life explosed in the sea

Paleozoic Era -Ordovician

Nov 6, 1903

505 - 438 million years
G - North Africa covered by Ice cap covers
B - Oceans Dominated by Invertebreates

Paleozoic - Silurian

Nov 6, 1904

438 - 408 million years
G - Coral reefs develop
B - Plants appear on land

Paleozoic Era - Devonian

Nov 6, 1905

408 - 360 million years
G - The rise and fall of seas over North America
B -Trilobites and Coral Flourish in ocean

Paleozoic Era -Carboniferous

Nov 6, 1906

360 - 286 million years
G - Appalachian Mountains begin forming
B - The first true reptiles appear

Paleozoic Era - Permian

Nov 6, 1907

286 - 245 million years
G -In the tropical Regions the Deserts become larger
B - Reptiles that are warm blooded appear

Mesozoic Era -Triassic

Nov 6, 1908

245 - 208 million years
G -center of the Pangaea is dominated by hot, dry conditions
B - Reptiles age begins

Mesozoic - Jurassic

Nov 6, 1909

208 - 144 million years
G -North America seperates from South Africa due to the Pangaea breaking apart
B -First birds appear

Mesozoic - Cretaceous

Nov 7, 1910

144 - 66 million years
G - Volcanic Activity occurs
B - Flowering plants occur

Cenozoic - Tertiary

Nov 7, 1911

66 - 1.8 million years
G -Continents continue to move in to present day form
B - Age of mammals start

Cenozoic Era - Quaternary

Nov 7, 1912

1.8 million years ago - Present day
G- Glaciers advance and retreat over all the Antarctica
B-Humans evolve in africa 100,000 years ago