Geologic Time Scale.

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The Geological Time Scale
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Presentation transcript:

Geologic Time Scale

Time Nick-name Era Period World LIFE Events Pre-Cambrian From 4.6 Billon YBP until 570 Million YBP "Shield" Regions of the world are formed Bacteria Algae and “SIMPLE" Life forms Age of Simple LIFE

Other Simple life forms

Time Nick-name Era Period World LIFE Events Paleo- zoic From 570 Million YBP until 245 million OLD Mountains form. (Appalachians in North America) Pangaea forms near end of Paleozoic Trilobites early fish, Am- phibians. Fern forests on land Age of Fish and Amphibians

Time Nick-name Era Period World LIFE Events Pangaea beaks apart at Age of Reptiles Meso- zoic From 245 Million YBP until 66 million Pangaea beaks apart at start of Mesozoic. Appalachians stop build up. Reptiles, birds and dinosaurs newly appear. (Most lifeforms become more diverse … Trilobites extinct)

Time Nick-name Era Period World LIFE Events From Trees 66 expand, Ceno- zoic From 66 Million YBP until Today Continents move to present locations. Rockies build. Numerous Ice-ages occur. Trees expand, Mammals expand humans appear. Dinosaurs are extinct Age of Mammals

We currently live in a time of ICE Ages in the Cenozoic ERA 10,000 years ago ice covered this area

We are in a time of high temperature and low ice volume…. that has happened before.

When will the ice come back? Lets hope that it won’t be as fast as …… The day after tomorrow

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