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Geological Time Scale Project

Mr. Prosser Earth & Space Science

Aliher Khan

on 8 December 2012

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Transcript of Geological Time Scale Project

Geological Time Scale By: Aliher Khan Precambrian Era Events End of bombardment of meteorites.
Moon is formed.
First signs of life (mostly stromatolites, other forms of bacteria and some trilobites)
Oxygen slowly filling up atmosphere.
Oldest types of rock formations and fossils found in this time. 4.6 billion to 635 million y.a Paleozoic Era 635 to 254 million y.a. Cambrian Period
685 to 489 million years ago Major Diversification of life on the planet.
Mostly composed of trilobites, worms, sponges and other aquatic creatures.
Animals with skeltons have evolved.
Mostly shallow oceans. Ordovician Period
489 to 445 million years ago Invertebrates diversify.
Early corals grow in ocean.
Small sea creatures dominant.
First green plants and fungi on land after a long ice age. Silurian
443 to 423 million years ago Vascular plants, pollen plants, and some with hard seed cases move on land to allow a more lush landscape.
First fish with jaws appear.
Mollusks and Trilobites still diverse. Devonian Period
423 to 372 million y.a. Ferns, club mosses, horsetails first appear.
First trees appear.
First (wingless) insects appear.
Shrimp, squid-like creatures arise.
Jawed fish rule the sea.
Trilobites and armored agnaths decline.
First amphibians still aquatic.

http://www.youtube.com/watch?v=5OOMrIy3jG8http://www.youtube.com/watch?v=5OOMrIy3jG8http://www.youtube.com/watch?v=5OOMrIy3jG8http://www.youtube.com/watch?v=5OOMrIy3jG8http://www.youtube.com/watch?v=5OOMrIy3jG8http://www.youtube.com/watch?feature=player_detailpage&v=5OOMrIy3jG8http://www.youtube.com/watch?feature=player_detailpage&v=5OOMrIy3jG8http://www.youtube.com/watch?feature=player_detailpage&v=5OOMrIy3jG8http://www.youtube.com/watch?feature=player_detailpage&v=5OOMrIy3jG8http://www.youtube.com/watch?v=5OOMrIy3jG8 Carboniferous Period
372 to 303 million y.a. Winged insects radiate suddenly and are quite large.
Amphibians diverse and common.
First reptiles appear.
Large primitive trees and mild climate tropical forests.
First land vertebrates appear. Permian Period
303 to 254 million years ago Landmasses unite to create super continent Pangaea.
End of Carboniferous glaciation.
Reptiles and amphibians are plentiful.
Beetles & flies evolve.
Marine life plentiful.
Permian-Triassic extinction wipes out 95% of life on Earth including all trilobites. Mesozoic Era
254 to 65 million y.a. Triassic Period
254 to 208 million y.a. Dinosaurs rule land, water and air.
First Crocodiles, and mammals appear.
Modern coral and insects appear. Jurassic Period
208 to 152 million y.a. Abundance of dinosaurs.
Mammals common but small.
Break-up of Pangaea into Gondwana and Laurasia. Cretaceous Period
152 to 65 million y.a. Flowering plants proliferate along with new types of insects.
More modern fish appear.
Modern sharks appear.
Many primitive birds start to replace flying dinosaurs.
Break up of Gondwana. Cenozoic Era
65 million y.a. to present day Tertiary Period
65 to 3 million y.a. Dinosaurs go into mass extinctions.
Mammals diversify rapidly.
Climate slowly starting to cool.
Ice age cycle starts.
First apes and many birds and mammals are more modern.
First grasses on land and first whales in the ocean. Quaternary Period
3 million y.a. to present day. Continents are at current positions.
Current ice age that still continues.
Some large mammals go extinct.
Humans come and gradually take over the planet. References/Research http://moodle.ddsbschools.ca/mod/resource/view.php?inpopup=true&id=100136 Prehistoric Era: Jurassic Period
http://www.youtube.com/watch?v=5OOMrIy3jG8////////// Wikipedia(n.d.) Geological Time Scale Wikipedia, December 6th 2012http://en.wikipedia.org/wiki/Geologic_time_scale#Table_of_geologic_time By the way i don't know how to undo the long line by Devonian period.
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