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Devonian Period
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Published on Nov 18, 2015
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PRESENTATION OUTLINE
1.
THE DEVONIAN PERIOD
NIC WALSH
2.
PALEOZOIC ERA
Ran from 542 million years ago to 251 million years ago.
The first vertebrate animals colonized land.
Life flourished in the seas
Trilobites were fading as fish became more diverse.
Referred to as The Age of Cockroaches.
3.
DEVONIAN PERIOD
When plants first had roots and leaves.
Known as the Age of The Fish.
Fish reached large diversity.
Climate was warm and lacked glaciers.
From 417 to 354 million years ago.
4.
DEVONIAN CONTINUED
characterized as a "greenhouse age".
broken into Early, Middle and Late subdivisions.
time of great tectonic activity.
Greenhouse age
Home to vertebrae animals.
5.
PLANTS
Lycophyte
Horsetail
Ferns
Photo by
VinothChandar
6.
ANIMALS
Agoniatitida
Acleistoceras
Bactroceras
Photo by
dbnunley
7.
MAJOR EVENTS
Mass extinction
Leaves and roots first appear.
Had a supercontinent.
8.
SOURCES
http://www.livescience.com/37584-paleozoic-era.html
http://en.wikipedia.org/wiki/Devonian_period
http://science.nationalgeographic.com/science/prehistoric-world/devonian/
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