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Plate tectonics and Earth's Surface - Coggle Diagram
Plate tectonics and Earth's Surface
Some definitions:
Continent: is a large landmass
Boundary: is the point or line where one region ends, and another begins
Crust: It is the outer layer of the Earth.
Alfred Wegener's Hypothesis
“Doesn't the east coast of South America fit exactly against the west coast of Africa, as if they had once been joined?”
Continental drift Hypothesis
All the continents were joined together in a single landmass and have since drifted apart.
Continents were all joined as a supercontient called Pangea.
Pangea began to break apart, the pieces of Pangea slowly moved to their present locations
Evidence from land features
He noticed that mountain ranges on the continents line up.
He noticed that coal fields in Europe and North America match up
Evidences from Fossils
Glossopteris is a fossil of these plant have been found in Africa, South America, India and Antartica.
Mesasaurous and Lystrosaurus have also been found in places now separated by oceans. Neither reptiles could have swum great distances across salt water
Evidence from climate
Wegner used evidence of climate change to support his hypothesis
As a continent moves toward the equator, its climate gets warmer.
As a continent moves toward the poles, its climate gets colder.
In either case, the continent carries along with the fossils and rocks that formed all of tits previous locations.
Wegener´s Hypothesis Rejected
He suggested that continents plowed across the ocean floors. But could not provide satisfactory explanation for the force that pushes or pulls the continents and could not identify the cause of continental drift
