FAQ: How Were The Fossil Symbols And Mountain Belts Helpful In Deciding Where To Move The Continents?

How did the fossil and rock evidence help in deciding where to place the landmasses?

Evidence from fossilized organisms and mountain chains can be used to reconstruct the positions of today’s continents and landmasses to form the supercontinent Pangea. Glossopteris ferns had very heavy seeds that could not move by wind or drift on ocean currents.

How did continent shape help in deciding where to place the continents which two continents have the most obvious fit of the coastlines?

Two continents have the most obvious fit of the coastlines are the east coast of South America and the west coast of Africa, because the east coast of South America and the west coast of Africa seem to fit together like pieces of a jigsaw puzzle. Wegener discovered that their rock layers are fit just as it clearly.

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How can fossils be used as evidence for continental drift?

There are many examples of fossils found on separate continents and nowhere else, suggesting the continents were once joined. If Continental Drift had not occurred, the alternative explanations would be: The species evolved independently on separate continents – contradicting Darwin’s theory of evolution.

Which fossil occurs on the most landmasses What does this suggest about when these particular continents broke up?

The Glossopteridales ( Glossopteris fossils) occur on the most landmasses. Their distribution across several detached landmasses led scientists to believe that these were once merged into a single supercontinent, Pangea.

What are 3 pieces of evidence for Pangea?

Alfred Wegener, in the first three decades of this century, and DuToit in the 1920s and 1930s gathered evidence that the continents had moved. They based their idea of continental drift on several lines of evidence: fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

Why the fossil evidence is good?

Evidence for early forms of life comes from fossils. By studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth. There are gaps in the fossil record because many early forms of life were soft-bodied, which means that they have left few traces behind.

What two continents seem to fit together most noticeably?

The east coast of South America and the west coast of Africa seem to fit together like pieces of a jigsaw puzzle, and Wegener discovered their rock layers “fit” just as clearly. South America and Africa were not the only continents with similar geology.

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Why the continents could not possibly move the way Wegener is describing?

In criticism of Alfred Wegener’s work, it may be difficult to prove otherwise his theory that continents “drift.” However, it may be possible that continents could not possibly the way he described it because he did not provide any hard evidence that would give the ultimate cause or mechanism for the continents to move

Why dont the shape of the continents fit perfectly into a supercontinent?

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.

What are 5 pieces of evidence that support continental drift?

In the early part of the 20th century, scientists began to put together evidence that the continents could move around on Earth’s surface. The evidence for continental drift included the fit of the continents; the distribution of ancient fossils, rocks, and mountain ranges; and the locations of ancient climatic zones.

What evidence did Alfred use?

He used fossil evidence, such as that of tropical plants found on the Arctic island of Spitzbergen. He found large-scale geographic features that matched, like the Appalachian Mountains in the United States and the Scottish Highlands, as well as rock strata in South Africa that matched those in Brazil.

What is the best piece of evidence for plate tectonics?

Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. Some life “rode” on diverging plates, became isolated, and evolved into new species.

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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.

Which fossil occurs on the most landmasses What does this suggest about when these particular continents broke up quizlet?

The Glossopteris fossils occurs on the most landmasses. This suggests that these particular continents broke up after the Glossopteris went extinct.

Why isn’t the fit perfect if the continents were once part of Pangaea?

Erosion from water is a big part. Islands have broken off; earthquakes have shifted continents; glaciers have formed, mountains have formed by continents being smashed together. It wasn’t a clean cut. It isn’t a perfect fit because time has altered the shapes of the continents.

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