Geologic Time Scale

The Big Bang

Jan 1, 1503

The massive explosion the created the universe. http://science.nationalgeographic.com/science/space/universe/origins-universe-article/

Birth of the Earth

Sep 5, 1503

Earth has started to be formed . Started about 4.5 billion years ago.

Precambrian Time

Period: Sep 22, 1503 to Dec 12, 1503

spans from the formation of Earth about 4570 Ma ago to the beginning of the Cambrian Period.

Cambrian Period

Dec 19, 1503

The first vertebrates are appearing and trilobites and branchiopods are most common. marine invertebrates also appear.

ordovician period

Dec 21, 1503

Most of the Earth is covered with water and has a warm and wet and plants were starting to form on the land.

silurian period

Dec 22, 1503

Animals and plants started " emerging" on land . eurypterids also appeared

Devonian Period

Dec 23, 1503

Known as the "Age of Fishes" amphibians begin appearing and seed-bearing plants begin developing.

mississippiann epoch

Dec 24, 1503

Lasted for about 40 million years. Euramerica and western Gondwana drifted northwards and moved closer together

pennsylvanian epoch

Dec 25, 1503

Lasted 33 million years. A result of the collision of Gondwana and Laurasia the supercontinent of Pangea begins to form

jurassic period

Dec 26, 1503

There are Dinosaurs, birds, rodents, sea monsters, sharks, and blood-red plankton. deserts started turning green. dinosaurs dominated the land .

triassic period

Dec 27, 1503

"Age of the dinosaurs." dinosuars appear.mammals appear.

cretaceous period

Dec 29, 1503

flowers appear. mass extiction . end on the mesozoic period. http://www.huffingtonpost.com/2012/12/08/volcanoes-killed-dinosaurs-india_n_2258395.html?utm_source=Triggermail&utm_medium=email&utm_term=Apple%20Investor&utm_campaign=AppleInvestor_Newsletter_042610

Oligocene epoch (12:00 pm)

Dec 31, 1503

appearance of the first elephants with trunks, early horses, and the appearance of many grasses. http://www.youtube.com/watch?v=PWjwHE6iJls

paleocene epoch (7:00)

Dec 31, 1503

mammals, birds, reptiles and marine animals that survived the mass Extinction. The Paleocene was the first epoch of the Paleogene period .

eocene epoch (9:00 am)

Dec 31, 1503

lasted from about 55.8 to 33.9 million years ago.. http://www.youtube.com/watch?v=pYSC6623K7I&playnext=1&list=PL4D3D544F92F5F918&feature=results_video

Miocene Epoch (1:00 pm)

Dec 31, 1503

warm climate.raccons and wolves appeared. large herds of grazing mammals appeared.

Pleistocene epoch (11:30 pm)

Dec 31, 1503

climate continues to cool . woolly mammoth , Rhinos and humans first appeared

Holocene Epoch (11:59 pm)

Dec 31, 1503

current time . climate warms up . .human society devolped.

Pliocene Epoch (8:00 pm)

Dec 31, 1503

the Panamanian land-bridge between North and South America appeared during the Pliocene, allowing migrations of plants and animals into new habitats. climate cooled.