Tuesday, April 14, 2009

Fact #1

Fact: South America and Africa used to fit together.



Source #1

http://www.ucmp.berkeley.edu/geology/techist.html

There are 4 sources that are presented by this website and they are all books. They include:

-The New View of the Earth by Seiya Uyeda, 1978 by W.H. Freeman and Co.
-The Earth's Dynamic Systems by W. Kenneth Hamblin, 1975 by Burgess Publishing Co.
-Global Tectonics by Philip Kearey & Frederick J. Vine, 1996 by Blackwell Sciences Ltd.
-Physical Geology by Carla W. Montgomery, 1987 by Wm. C. Brown Publishers.

I reseached about these books and they are valid thus this website is credible. Also there is the fact that I found this article in UCMP's website which is the Univeristy of California Museum of Paleontology. This sources says that the fact is true and I do belive the source because they have information supporting it. Wagner, who introduced the idea of continental drift found out that the same fossilized plants and animals from the same time period were found in South America and Africa. Huge belts of rocks were found in Africa and South America were identical and not just that but they would match up if the continents were put together. Wagner's explanation was that as the continents moved, the leading edge of the continent would encounter resistance and thus compress and fold upwards forming mountains near the leading edges of the drifting continents. Fourth, there is proof that glaciers moved from Africa, through the Atlantic Ocean, and then on towards South America.



Source #2

http://www.enchantedlearning.com/subjects/dinosaurs/glossary/Contdrift.shtml

At the end of the website, there is a source listed and one of it includes a link to a article that was written by a professor, Wagner, at Yales-New Haven Institute. This is a credile source because it has many information and is a website dedicated learning kids and letting them know about the world and everything aorund them. It said that the fact is true and yes i believe it because they have facts supporting it. There are many diagrams and moving pictures that show very clearly what happened. It shows the proof of animal and plant fossils that were similar in both places. It also said that it was a divergent (seafloor spreading) and thus it broke apart.

Source#3

http://waynesword.palomar.edu/cntdrift.htm

This source has other sources on bottom of the website page and it shows that all of the information was taken from the copywright textbook W. P. Armstrong. This is a credile source because it is actually a well protected website kept by a teacher which means that pretty much nobody hack into it and cahnge. The source says that the fact is true and i believe it because it gave the support information as the other two websites. And this shows that the information is infact true because it overlaps. It also goes more indept with evolution and plan distribution more than continental drift (glacier exmaple).

I DO BELIVE THIS FACT !!! because it is a fact. There are so many supports and evidence that South America and Africa used to fit together, some include the fact that smae fossil plants and animals were found in both places, same conditions were tracked when tracked back long ago, and there are also the huge belt of rocks which are like tow halves of a whole when put together.

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