Geological time by Jeremiah weldon

Archean is a geologic eon, 4,000 to 2,500 million years ago (4 to 2.5 billion years), that followed the hadean Eon and preceding the Proterozoic Eon.

The archean atmosphere is thought to have nearly free lacked oxygen.

There is a substantial evidence that life came into existence either near the end of hadean Eon or early in the Archean Eon.


This time period was around to 541 to 252.17 million years ago.

The Earths, atmosphere has changed over billions of years, but for the past 200 million years it's been much as it today.

Two great animal faunas dominated the seas during the paleozoic.... gave rise the reptiles and synapsids by the end of paleozoic.

the main events were permian, Devonian.

the time period was 225 million years ago

during the trassic oxygen levels in the atmosphere fell to a little 15%

diversified rapidly and a giant reptiles, dinosaurs and other monstrous beast roamed the earth.


This time period 65 millions years.

Quaternary period (2.6 millions years ago to the present), consisting the pleistocene and Holocene epoch).

cave lions, sabre- toothed cats, cave bears, giant deer, wolly rhinoceroses, and wolly mammoths were prevailing species of the quaternary period.


Created with images by NASA Goddard Photo and Video - "Blue Marble 2000" • skeeze - "world earth planet" • Myriams-Fotos - "sunset clouds sky" • Mr B's Photography - "Life" • James St. John - "Diamonds - Their Geology, Geography, and History" • subarcticmike - "Cracking Deep Dissection" • James St. John - "Sphalerite-galena (Hilltop Mine, Cochise County, Arizona, USA)" • James St. John - "Rhizophora mangle (red mangroves) (San Salvador Island, Bahamas) 7" • James St. John - "Two-beam interference colors in fluorite (Cave-in-Rock, Illinois, USA)" • dsearls - "2015_02_10_lax-ewr_303" • James St. John - "Galena-dolomite (Big Bear Orebody, Fletcher Mine, Reynolds County, Missouri, USA) 2" • Grand Canyon NPS - "Grand Canyon National Park- Brachiopod Fossils in Kaibab Limestone_0378" • BioDivLibrary - "n90_w1150" • Ben124. - "Crystal Palace Park" • Ben124. - "Crystal Palace" • James St. John - "Resetting Evolution’s Clock? End-Cretaceous Extinction and the Origin of Modern Mammals"

Made with Adobe Slate

Make your words and images move.

Get Slate

Report Abuse

If you feel that this video content violates the Adobe Terms of Use, you may report this content by filling out this quick form.

To report a Copyright Violation, please follow Section 17 in the Terms of Use.