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Pangaea (Independent Study)
Transcript of Pangaea (Independent Study)
be if Pangaea was
in the Present Day?
By: Ryann J. McTague
What evidence can prove the theory
of Pangaea existed?
There are fossils of the extinct seed-fern,
Glossopteris, found in all of the southern continents, (Australia, Antarctica, Africa, and South America) and also in India. The Glossopteris seed-fern supposedly had heavy seeds, in which the wind couldn't have blown away to another continent.
The fossils of a land reptile, called Lystrosaurus,
were found in Africa, India, and Antarctica.
The herbivorous, 1 meter long Lystrosaurus ("Shovel lizard")
Fossil of the Glossopteris (meaning 'tongue', because of tongue shaped leaves)
Theories of 'Continental Drift' and the Earth's Plate Tectonics (which causes earthquakes) evidently proves that the continents did in fact drift apart.
In the 1950's through 70's scientists started talking about Earth's ocean floors and crust. In the 60's, a scientist thought of 'Sea Spreading', when magma from the crust emerges and separates the sea floor. While on the study, scientists found that the ocean floor was like a conveyor belt. When a new floor materialized, some old floor disappeared into oceanic trenches.
Also, the scientists were also noticing that volcanic activity and earthquakes occurred near the spreading ridges and oceanic trenches. Together, the evidence suggests that though the continents really are moving, it's actually not the force of the continent, it's the rather the Earth's crust.
What are the
F A C T S
Pangaea existed for
100 million years!
Pangaea was fully
formed during the
late Permian times!
As said in Question #1: "Plate Tectonics," the continents are moving. In some places where the Tectonics are very strong, continents can move at a rate of about 4 inches per year. Some scientists actually compare continental movement to the speed of human fingernail growth! Although: it is not only how fast the continents move; it's also very important how or where these big land chunks move. Continents or Tectonic Plates can: (using two plates) move away from each other, collide, (using one plate) can be pushed underneath another plate, or (use of multiple plates) can slide past each other sideways. Either of these movements can create mountains, earthquakes, or as we've heard: supercontinents.
Notwithstanding, some scientists believe that in order for Pangaea to occur again, it must go through the same supercontinent-pattern: Rodinia, Permian (Pangaea), Triassic, Jurassic, Cretaceous, then supposedly present-day. Some other scientists suspect the next supercontinent will be Amasia; they also predict it will occur 200 million years in the future, so we have time to wait. They imagine the layout being Asia connecting with North America, with South America fusing in.
The ocean that surrounded
Pangaea was called
Thank you for viewing:
Pangaea supposedly covered
about one third of the Earth's
Alfred Wegner, who
'invented' the theory, was
a meteorologist as well
as a geologist.
The Himalayan Mountains
were formed when India
connected itself to Eurasia!
(Europe and Asia connected,
like it is today.)
The origin of the word "Pangaea"
comes from the early 20th century
word 'Pan' meaning all + the
Greek 'gaia' meaning earth.
Pangaea was 250 million
(If this supercontinent were based in present times, what could happen?)
(Could Pangaea occur again? *if it actually
Have a "Pan"-tastic Day!
There are several reasons that Pangaea being set in modern times could be reasonable and satisfying.
One explanation is that there wouldn't be a reason to sail to the other side of the supercontinent, unless for pleasure. What about mountains? Mountains are made by to plates pushing together, which never really happened it Permian times. No push, just pull of plates. In addition to not boating, there wouldn't be much waste and exhaust making our oceans treacherous for marine life.
Another motive may be about time difference. If a friend or family member decides to take a trip, there wouldn't be that long 8 hour time difference from Point A to Point B. The largest time difference would probably be around 5 hours.
Although the passage above may sound convincing to live in the Permian times, there is a bad side to it as well.
One example of it not being so great to live in the Permian times is that you'd be water-locked. One big island; no where to go during a tsunami. The heart of Pangaea may be the place to go, but what about flooding? No where to go, except out afloat.
Another intention to consider is that there wouldn't be as many available resources as we do now. Plants, crops and animals depend on what the temperature, or climate, is like that certain area. In the other two-thirds of the world, there's still sun glowing there. So the items would be scarce, because there would be no land to let plants grow.