How did Alfred Wegener find out about Pangea?
Wegener concluded that South America and Africa (as well as others) had been connected to one another, possibly through land bridges, some 250 million years ago. Wegener used Seuss’s work to support his own continental drift hypothesis and considered Gondwanaland to be the southern half of Pangea.
Who invented Pangea?
What else did Alfred Wegener discover?
What were Alfred Wegener’s contributions? Wegener noticed the similarity in the coastlines of eastern South America and western Africa and speculated that those lands had once formed a supercontinent, Pangaea, which had split and slowly moved many miles apart over geologic time.
Why did other scientists disagree with Wegener?
Continental Drift challenged the idea that the continents were much the same today as in the past. These ideas were heresy to the community of Geological scientists had to be rejected. The lack of a mechanism for Continental Drift was the excuse for the scientific community to reject the theory of Continental Drift.
Why did Alfred Wegener’s theory get rejected?
The main reason that Wegener’s hypothesis was not accepted was because he suggested no mechanism for moving the continents. He thought the force of Earth’s spin was sufficient to cause continents to move, but geologists knew that rocks are too strong for this to be true.
Is true of Earth’s landmasses?
Earth’s Landmasses. There are only four major landmasses on Earth. A continent is a landmass that measures millions of square kilometers and rises a considerable distance above sea level. Each continent has at least one large area of very old rock exposed at its surface called the shield.
What happens when two oceanic plates diverge?
When two oceanic plates diverge, underwater ridges and mountain ranges form, such as the mid-Atlantic Ridge. Those rift valleys would eventually lead to magma rising to form new crust also, but usually before that can happen, the continent breaks apart, and water rushes in to create a new ocean.
What is a real life example of a convergent boundary?
The Cascade Mountain Range is a line of volcanoes above the melting oceanic plate. The Andes Mountain Range of western South America is another example of a convergent boundary between an oceanic and continental plate. Here the Nazca Plate is subducting beneath the South American plate.