Geologic timeline harrish
Transcript of Geologic timeline harrish
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Earth’s HistoryPresented by Valerie Harrish
MGMS 7401
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Precambrian Era:also known as the Ice Age
• The time period that defined Earth as an “Ice House”.
• The oldest known supercontinent existed on Earth at this time, called Rodinia.
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Paleozoic Era:the Cambrian Period
During this period, the land mass that covered much of the Earth’s surface was known as Gondwana.
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Paleozoic Era:the Ordovician Period
The major ocean of this period was the Panthalassic Ocean.
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Paleozoic Era:the Silurian Period
There is a lack of “white” or obvious ice caps on the map during this time period, perhaps suggesting that this was a warmer time than we even know now.
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Paleozoic Era:the Devonian Period
With the collision of continents, the Appalachian Mountain began to appear during this period.
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Paleozoic: Early Carboniferous & Late Carboniferous
Coal beds begin to forming during the early period. By the late period, we see ice caps beginning to take shape.
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Paleozoic Era: the Permian Period
As the era came to a close, the continents collided once again to form the supercontinent Pangea.
Earth is nearly unrecognizable compared to current day.
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Mesozoic Era:the Triassic Period
In this period, we really see a lot of migration and movement of animals across the supercontinent, Pangea.
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Mesozoic Era:the Jurassic Period
The Atlantic ocean is beginning to form and the continents are beginning to take shapes we know
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Mesozoic Era:the Cretaceous Period
The movement of tectonic plates caused the Rocky Mountains to form. For A subduction occurred with the pacific plate and North America.
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Cenozoic Era:the Eocene Period
About 50 million years ago the Himalayans to formed when the Indian plate collided with the Eurasia plate.
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Cenozoic Era:the Miocene Period
In this period, the Earth and its continents begin to take the shape and formations that we know and recognize now.
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Future World
The continually moving plates will eventually cause continents to collide again to form a Pangea Ultima in one large Pacific Ocean.
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REFERENCES:
Scotese, C. (2010). Paleomar project: Earth
history. Retrieved September 15, 2014 from
http://www.scotese.com/earth.htm