the earth is 4.6 billion years old
DESCRIPTION
The Earth is 4.6 Billion years old. This has been broken down into 4 major time periods (Eras ). The 4 Time Eras are not equal in length. The last one hasn’t ended yet The first one is extremely long. The Pre-Cambrian Era is the Longest. Life forms were limited to Oceans. - PowerPoint PPT PresentationTRANSCRIPT
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The Earth is 4.6 Billion years old
This has been broken down into 4 major time periods (Eras).
The 4 Time Eras are not equal in length.
The last one hasn’t ended yet The first one is extremely long
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The Pre-Cambrian Era is the Longest. Life forms were limited to Oceans.
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Since the PreCambrian, 3 time Eras have seen different forms of life dominate the fossil record.
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EraTime Perio
d
Geology Events
LIFE Nick-name
Pre-Cambrian
From 4.6 Billon Years ago
until
570 Million Years ago
"Shield" Regions
form from
Magma
Bacteria
Algae
and
“SIMPLE" Life
forms
Age of Simple LIFE
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Canada in early Pre-Cambrian Era
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Canada near end of Pre-Cambrian Era
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Era Time Period
Geology Events
LIFE Nick-name
Pale
ozoic
From
570Million YBP
until
245Million YBP
OLDEST Mountains
Form on edgeof shields.
(Appalachians
in
North America)
Pangaea forms
near end of Paleozoic
Trilobitesearly fish,
Am-phibians.
Fern forests on land
Age of Fish, Trilobites, and Amphibians
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Skeletons of creatures that have gills and lungs existed in this Era. Many of these creatures also had fins for swimming with small legs for land movement.
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Paleozoic Era.North America moved East to meet Europe to form PANGEA Appalachian (eastern Mountains) build up
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Paleozoic Era.North America moved East to
meet Europe Appalachian (eastern Mountains) build up
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Era Time Period
Geology Events
LIFE Nick-name
Age of Reptiles
Mes
ozoic
From
245 Million
YBP
until
65 million YBP
Pangaeabeaks
apart at start.
Asteroid Impact Ends
Era
Reptiles, birds and dinosaur
s newly
appear.
(Most lifeforms become more diverse
…
Trilobites extinct)
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Mesozoic Era.North America moves West
Rocky (western Mountains) build
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Mesozoic Era.North America moves West
Rocky (western Mountains) build
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Era Time Period
Geology Events
LIFE Nick-name
Cenozoic
From
65 Million YBP
until
Today
Platesmove
to presen
t places.
Rockiesbuild.
Numerous
Ice-ages
occur.
Mammals
expand human
s appear.
Dinosaurs are extinct
Age of Mammals
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We currently live in a time of ICE Ages in the Cenozoic ERA
10,000 years ago ice covered this area
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We are in a time of high temperature and low ice volume….that has happened before.
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When will the ice come back?Lets hope that it won’t be as fast as
……The day after tomorrow
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Canada (Present Time).North America moves West
Rocky (western Mountains) build