English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

How did the Continents get divide up in to Country and so and so

2006-12-10 15:19:07 · 12 answers · asked by Ireqiredlotofhelp 1 in Science & Mathematics Geography

12 answers

Can you believe that the various continents were connected to each other once upon a time! There was also an extensive
ocean that surrounded that ‘supercontinent’. In course of time that continent broke up and the fragments drifted to different directions. Man could not witness these events that took place several million years ago, because man was not originated at that time. You may now ask the question: How then did we come to know about these? Time has preserved records of these events in the rocks. When man’s intelligence was combined with his enthusiasm, he could bring to light several secrets of the past. Let us have a brief discussion of these developments.

The origin of the concept of drifting continents With the beginning of the 17th century,outlines of most of the continents had been made. The similarity between the east coast of South America and the west coast of Africa attracted the attention of early
explorers and scientists. Many people including the English
philosopher Sir Francis Bacon, Flemish cartographer Abraham
Ortelius and French scientist Françoise Placet the 17th century,
pointed out similarity between the continental outlines on both sides of the Atlantic. This indicated that the continents of the western hemisphere were once united with Europe and Africa during some period in the long history of the Earth. In 1878, a
scientist named Antonio Snider Pelligrini supported this view with
substantive evidence. He observed similarities between the fossil plants of the coal deposits that formed during the Carboniferous Period in Europe and North America. However, these suggestions could not gain much recognition in the scientific world. Ever since the beginning of the 20th century, several evidences have been obtained for the existence of a
supercontinent in the southern hemisphere. In 1885, the Austrian
geologist Edward Suess proposed the name Gondwanaland for that ancient supercontinent. It covered the present Indian Peninsula, the Islands of Sri Lanka and Madagascar, and the
continents of Africa, South America and Antarctica. The similarity of the deposits left behind by ice sheets that covered extensive regions of these land masses between 380 to 250 million years ago (corresponding to the end of the Carboniferous Period
and the beginning of the Permian period) as well as the similarity of the fossils of animals and plants that lived prior to that period in these areas, were the major evidences that indicated the
existence of the gondwanaland. Suess believed that, in addition to the gondwanaland yet another continent also existed in the southern hemisphere. It consisted of the present day Australia and the Patagonia. He gave the name 'Antactics' to that continent. He also believed that, there probably existed two more continents in the northern hemisphere, during that time.Suess also held the views that by the process of large scale faulting,
extensive segments of landmass were detached from the ancestral continents and they subsequently floundered. These formed ocean floors and the remaining masses formed the present continents. However, where it was found that the density of the rocks of the ocean floor is more than that of the continents the hypothesis of Sucess became unacceptable to the scientific
world.

The contries are the demacation made by group people having similar nature and tastes in each area. -

2006-12-10 18:21:42 · answer #1 · answered by Anonymous · 1 1

200 million years ago, the supercontinent, Pangaea, split up and the pieces slowly drifted apart and formed today's continents.. Alfred Wegener theory of continental drift is supported by..
- some continental coastlines appearing to fit together
- matching fossil reptiles
- rocks of same age and geological structure
- presence of coal under Antartica ice cap (formed under warm, wet conditions)

the tectonic plates are always on the move, which give rise to volcanoes, earthquakes, fold mountains, tsunamis, etc

2006-12-10 22:13:23 · answer #2 · answered by pigley 4 · 0 0

The Earth's crust is constantly moving, both vertically and horizontally, at rates of up to several inches a year. A widely-held theory that explains these movements is called "plate tectonics." It was developed in the mid 1960s by geophysicists. The term "plate" refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the continents and ocean floor above them move as well. Continential Drift occurs when the continents change position in relation to each other.
While plate tectonics is a relativily new idea, scientists have been gathering data in support of the Continental Drift theory for a very long time. In 1912, Alfred Wegener and Frank Taylor first proposed the theory that 200 million years ago the Earth had only one giant continent, from which today's continents broke apart and drifted into their current locations. Wegener used the fit of the continents, the distribution of fossils, a similar sequence of rocks at numerous locations, ancient climates, and the apparent wandering of the Earth's polar regions to support his idea.


The Shapes Match
The continents look as if they were pieces of a giant jigsaw puzzle that could fit together to make one giant super-continent. The bulge of Africa fits the shape of the coast of North America while Brazil fits along the coast of Africa beneath the bulge.

The Plants and Animals Match
Wegener noted that plant fossils of late Paleozoic age found on several different continents were quite similar. This suggests that they evolved together on a single large land mass. He was intrigued by the occurrences of plant and animal fossils found on the matching coastlines of South America and Africa, which are now widely separated by the Atlantic Ocean. He reasoned that it was physically impossible for most of these organisms to have traveled or have been transported across the vast ocean. 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.

The Rocks Match
Broad belts of rocks in Africa and South America are the same type. These broad belts then match when the end of the continents are joined.

The Ice Matches
Wegener was aware that a continental ice sheet covered parts of South America, southern Africa, India, and southern Australia about 300 million years ago. Glacial striations on rocks show that glaciers moved from Africa toward the Atlantic Ocean and from the Atlantic Ocean onto South America. Such glaciation is most likely if the Atlantic Ocean were missing and the continents joined.

The Positions Don't Match
If the continents were cold enough so that ice covered the southern continents, why is no evidence found for ice in the northern continents? Simple! The present northern continents were at the equator at 300 million years ago. The discovery of fossils of tropical plants (in the form of coal deposits) in Antarctica led to the conclusion that this frozen land previously must have been situated closer to the equator, in a more temperate climate where lush, swampy vegetation could grow.

Why Few People Believed
Wegener's Continental Drift theory was not readily accepted by the science community of his day. It was difficult to conceive of large continents plowing through the sea floor to move to new locations. What kind of forces could be strong enough to move such large masses of solid rock over such great distances? Wegener suggested that the continents simply plowed through the ocean floor, but Harold Jeffreys, a noted English geophysicist, argued correctly that it was physically impossible for a large mass of solid rock to plow through the ocean floor without breaking up. Recent evidence from ocean floor exploration and other studies has rekindled interest in Wegener's theory, and lead to the development of the theory of plate tectonics.

2006-12-10 15:33:38 · answer #3 · answered by TransparentEarth 2 · 0 1

Well a short answer is that the internal heat of our planet maks the rock under the continets molten. So the continental plates ride on this molten rock and the currents move the plates apart. This is what causes earth quakes. One plate will dive under another and grind and slip, the slip is what produces earthquakes,

2006-12-18 03:15:26 · answer #4 · answered by Ernie R 2 · 0 0

You see, the world was first a big huge continent but later the intercontinental plates shifted and sent the landmasses in different directions. In fact, they are still moving as of today.

2006-12-10 15:26:16 · answer #5 · answered by wounded_soldier2 1 · 0 1

Of course God divided the world with water he created the heavens and the earth and everything that is on earth he created the seas the oceans and every other branch of water and every living thing on earth.He did it all in 6 days and on the 7th he rested he looked at it all and said it was good.

2006-12-15 05:31:13 · answer #6 · answered by Gina S 2 · 0 1

honestly, i dont know, but there are theories. continental drift is one. that is where the continents begin as a large clump and then eventually broke apart and created there own land masses. the continents, today, actually drift two inches per year. hope that helps.

2006-12-10 15:26:46 · answer #7 · answered by Anonymous · 0 1

all happened at that time from when the NOAH'S ark began to sail till the Noah's ark landed somewhere near or on the mountains ararat..

The continents where formed because of the activities of powerful earthquakes n powerful tsunamis occurred then at the time when the Noah's ark was floating on big waves as big as mountains

2014-01-31 17:13:22 · answer #8 · answered by Anonymous · 0 0

Plate techtonics.

At the rate we are going, we may have nine continents in millions of years

2006-12-10 16:46:13 · answer #9 · answered by Anonymous · 0 1

didn't you watch ice age
a squirrel is collecting nuts for winter so he needed some where to put it,so he decided to put it under ground so he tried to force it. a small crack was made and it grew larger and larger

2006-12-17 04:22:57 · answer #10 · answered by Anonymous · 2 0

fedest.com, questions and answers