South America and Africa were once together, but were split apart by the formation of a diverging plate boundary. This is confirmed by matches between the rocks and fossils of the two continents. Plate motion, not continents drifting, explains this. The two continents are still moving away from each other today.
Why do the coastlines of Africa and South Africa fit together so well?
According to the theory of continental drift, why do the coastlines of Africa and South America appear to fit together so well? … Africa and South America are drifting towards each other and will soon fit together perfectly. Ocean currents on either side of the Atlantic have eroded the coastlines into the same shape.
How did Africa and South America get pushed apart?
According to the study, the tectonic plates attached to the Americas are moving apart from those attached to Europe and Africa by four centimetres each year. … Researchers reported that it is typically believed that the shifting of tectonic plates is driven by forces of gravity or the plates sinking back into the Earth.
Why does Pangea not fit perfectly?
There are several reasons due to which the present shapes of the continents will not fit perfectly into a super continent. The main reason can be attributed to erosion and rise and fall of the water levels. … this never allows the continents to remain in the shape in which they were separated from one another.
Why did no one believe Wegener’s theory?
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.
What do you notice about South America and Africa coastlines?
In the early 1900s, the German scientist Alfred Wegener noticed that the coastlines of Africa and South America looked like they might fit together. He also discovered evidence that the same plant and animal fossils were found along the coasts of these continents, although they were now separated by vast oceans.
What is the evidence that South America and Africa were once joined?
To him, the presence of identical fossil species along the coastal parts of Africa and South America was the most compelling evidence that the two continents were once joined.
Are continents sinking?
The continents, “floating” on the earth’s denser interior, have sunk as much as two miles below their “proper” height, according to a report in the February issue of Geophysical Research Letters. … It has long been assumed that the continents float on the underlying rock, just as an iceberg floats in water.
Did America discover Africa?
Even more ancient African skeletons that would clearly predate Columbus’ arrival in the Americas were discovered throughout Central America and South America with some even being unearthed in what is now California.
Why did Pangea break up?
During the Triassic Period, the immense Pangea landmass began breaking apart as a result of continental rifting. A rift zone running the width of the supercontinent began to open up an ocean that would eventually separate the landmass into two enormous continents.