"F$H:R��!z��F�Qd?r9�\A&�G���rQ��h������E��]�a�4z�Bg�����E#H �*B=��0H�I��p�p�0MxJ$�D1��D, V���ĭ����KĻ�Y�dE�"E��I2���E�B�G��t�4MzN�����r!YK� ���?%_&�#���(��0J:EAi��Q�(�()ӔWT6U@���P+���!�~��m���D�e�Դ�!��h�Ӧh/��']B/����ҏӿ�?a0n�hF!��X���8����܌k�c&5S�����6�l��Ia�2c�K�M�A�!�E�#��ƒ�d�V��(�k��e���l ����}�}�C�q�9 Announcing our NEW encyclopedia for Kids. Another indication of continental drift is tectonic activity and seafloor spreading. 7 0 obj %PDF-1.4 Finding fossils of the Mesosaurus on the southern hemispheres of both continents is a further indication that the two continents were once together and later drifted apart. 2y�.-;!���K�Z� ���^�i�"L��0���-�� @8(��r�;q��7�L��y��&�Q��q�4�j���|�9�� Will 5G Impact Our Cell Phone Plans (or Our Health?! 6 0 obj N'��)�].�u�J�r� Fossils. Scientists agree that continents rest on rocks called tectonic plates, which shift and move. Looking at a map of the world, it appears that the eastern edge of South America and the western edge of Africa could fit together like interlocking puzzle pieces. �x������- �����[��� 0����}��y)7ta�����>j���T�7���@���tܛ�`q�2��ʀ��&���6�Z�L�Ą?�_��yxg)˔z���çL�U���*�u�Sk�Se�O4?׸�c����.� � �� R� ߁��-��2�5������ ��S�>ӣV����d�`r��n~��Y�&�+`��;�A4�� ���A9� =�-�t��l�`;��~p���� �Gp| ��[`L��`� "A�YA�+��Cb(��R�,� *�T�2B-� As molten rock rises from the Earth, it forms new crust between the plates. According to National Geographic, sea floor spreading and plate tectonics indicate that the continents do move or shift, which supports continental drift theory. Mountain Ranges.

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One indication of this possibility is the appearance of the western African and eastern South American coasts, which look like two interlocking jigsaw puzzle pieces. Scientists agree that continents rest on rocks called tectonic plates, which shift and move. However, would you believe if someone told you that these broken land masses were once connected to each other as one huge supercontinent? A discussion of some of the evidence supporting continental drift on Earth. stream ��w�G� xR^���[�oƜch�g�`>b���$���*~� �:����E���b��~���,m,�-��ݖ,�Y��¬�*�6X�[ݱF�=�3�뭷Y��~dó ���t���i�z�f�6�~`{�v���.�Ng����#{�}�}��������j������c1X6���fm���;'_9 �r�:�8�q�:��˜�O:ϸ8������u��Jq���nv=���M����m����R 4 � 1. <> Evidence for Continental Drift. Well, this claim was made in the 90s by Alfred Wegener, a German polar researcher, meteorologist and geophysicist who died in 1930. Theory of the Continental Drift. Matching Rocks.

Evidence for Continental Drift. endobj

What Evidence Is There of the Continental Drift Theory.
Fossils - certain fossils preserved in rocks of the same age but from different continents. Another indication of continental drift is tectonic activity and seafloor spreading. 3. Fact Check: What Power Does the President Really Have Over State Governors? �V��)g�B�0�i�W��8#�8wթ��8_�٥ʨQ����Q�j@�&�A)/��g�>'K�� �t�;\�� ӥ$պF�ZUn����(4T�%)뫔�0C&�����Z��i���8��bx��E���B�;�����P���ӓ̹�A�om?�W=

Sea floor spreading indicates that since the continents presently move apart, previous continental drift was possible and probable as well.

H���yTSw�oɞ����c [���5la�QIBH�ADED���2�mtFOE�.�c��}���0��8�׎�8G�Ng�����9�w���߽��� �'����0 �֠�J��b� Heavy glaciers carve grooves in the rock as they move across land.
�ꇆ��n���Q�t�}MA�0�al������S�x ��k�&�^���>�0|>_�'��,�G! There are various examples of fossils found on separate continents and in no other regions. endobj Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. If you take a look at a map of the earth today, you will see the current locations of broken land masses that constitute the earth. Many rocks from Argentina were identical to those found in South Africa. Continental drift is a theory originally proposed by Alfred Wegener, who believed the continents were once one large continent known as Pangaea that later separated into several continents. 5 0 obj The earliest marine fossils found along the eastern coast of South America and the western coast of Africa date from about 150 to 200 million years ago, suggesting that the Atlantic Ocean did not exist prior to that time. Puzzle - like fit of continental shelves. Scientists have long noticed the similarity between the two coastlines, but it was not until the 20th century that evidence could support a theory that the continents were once connected. 8 0 obj Wegener gathered evidence for his hypothesis from fossils, from studies of ancient climate, and from the geology of continents. n�3ܣ�k�Gݯz=��[=��=�B�0FX'�+������t���G�,�}���/���Hh8�m�W�2p[����AiA��N�#8$X�?�A�KHI�{!7�. Climaterefers to a pattern of wind, temperature, and rain or snow that occurs in a region over time. endobj Ex. Chapter 6:Plate Tectonics 191. 4 pieces of evidence for continental drift by Alfred Wegener (An Analysis of – Evidence and Rejection of the Theory) During the second and third decades of the twentieth century, the notion of continental drift was revived, most notably by the German meteorologist and geophysicist Alfred Wegener.. Wegener put together the first comprehensive theory to describe and partially … 3.

Glossopteris - plant remains found in South America, Australia, Asia and Africa. 6. Sea floor spreading further supports the continental drift theory. Fossils of the Mesosaurus, an ancient freshwater reptile found in the southern parts of South America and Africa, also indicate that the two continents could have once been one solid continent that drifted apart, since the reptile could not have swum across the ocean. Continents fit like Puzzle Pieces. 2. <> 4. -Diamond like rocks found in South America and Brazil.

<> endobj %���� When this occurs, the sea floor grows wider, pushing the two continents apart. Festival of Sacrifice: The Past and Present of the Islamic Holiday of Eid al-Adha.

Other fossil evidence also supports the theory of continental drift.

Another important piece of evidence in the Continental Drift theory is the fossil relevance. <> <> ), The Secret Science of Solving Crossword Puzzles, Racist Phrases to Remove From Your Mental Lexicon. Finding fossils of the Mesosaurus on the southern hemispheres of both continents is a further indication that the two continents were once together and later drifted apart. 11 0 obj Sea floor spreading further supports the continental … Earth’s climates have changed many times in the planet’s long history.

Africa and South America fit nearly perfectly.

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