Upload
camperesl
View
315
Download
4
Tags:
Embed Size (px)
DESCRIPTION
Super Continent
Citation preview
What is Pangaea?
What is Continental Drift?
What is a Theory?
Alfred Wegener: German scientist
=
Wegener was a geologist.
Geologists study rocks and fossils.
Alfred Wegener
?1912: The Theory of Continental
Drift
Alfred Wegener
1912: The Theory of Continental Drift
idea
land
movement
Wegener studied fossils from South American and Africa. He saw some fossils were the same.
1912: The Theory of Continental Drift
1912: The Theory of Continental Drift
Wegener studied fossils from South American and Africa. He saw some fossils were the same.
1912: The Theory of Continental Drift
Wegener studied fossils from South American and Africa. He saw some fossils were the same.
1912: The Theory of Continental Drift
Wegener studied fossils from South American and Africa. He saw some fossils were the same.
1912: The Theory of Continental Drift
Some fossils were the same. How did that happen?
1912: The Theory of Continental Drift
1912: The Theory of Continental Drift
Wegener wrote an article about this theory. He invented the name ‘Pangea.’
Pangea
Pangea.From the Greek wordsPan = ‘all’ and Gaia = ‘Earth’
Pangea, the Supercontinent
Eurasia
Australia
Africa
North America
South
America
Antarctica
65,000,000 years ago
Now
http://pubs.usgs.gov/gip/dynamic/historical.html#anchor4833509
1,600,000,000 years ago
Today
Copyright: C. R. Scotese, PALEOMap Projecthttp://www.ucmp.berkeley.edu/geology/anim1.html
Copyright: C. R. Scotese, PALEOMap Projecthttp://www.ucmp.berkeley.edu/geology/anim1.html
Copyright: C. R. Scotese, PALEOMap Projecthttp://www.ucmp.berkeley.edu/geology/anim1.html
Copyright: C. R. Scotese, PALEOMap Projecthttp://www.ucmp.berkeley.edu/geology/anim1.html
Copyright: C. R. Scotese, PALEOMap Projecthttp://www.ucmp.berkeley.edu/geology/anim1.html
Copyright: C. R. Scotese, PALEOMap Projecthttp://www.ucmp.berkeley.edu/geology/anim1.html
Question: Why are the continents drifting?
Answer: Plate tectonics
This is a plate.
This is a plate.
plate = landtectonics = building or moving
This is a plate.
This is a plate.
Answer: Plate tectonics
Answer: Plate tectonics
This is a plate.
This is a plate.This is a plate.
This is a plate.
This is a plate.
http://dogfoose.com/2011/03/plate-tectonics/
The red areas around the plates (the plate boundaries) are ‘hot zones’ where earthquakes happen.
The red areas around the plates (the plate boundaries) are ‘hot zones’ where earthquakes happen.
How do the plates move?
1. Plates slide past each other.
Earthquakes happen between
the plates.
Example: The San Andreas Fault in California
2. Plates separate from each other.
Volcanoes erupt between the plates under
the ocean. The ocean floor bigger.
Example: This Rift Valley in East Africa
3. Plates crash into each other.
Crashing plates make mountains.
http://www.divediscover.whoi.edu/tectonics/tectonics-collide.html
3. Example: Mountains in Peru, South America
Will the continents continue to drift?What will the earth look like in the future?
Will the continents continue to drift?What will the earth look like in the future?
http://files.myopera.com/edwardpiercy/blog/6-Future-250AP-2.jpg
finis