the continents either side of the Atlantic Ocean seemed to nearly fit together. In 1912 Alfred Wegner published the theory of continental drift suggesting that the continents used to be joined together in an ancient supercontinent which he named Pangaea. He then proposed that it later split in to two continents- Laurasia in the north and Gondwanaland in the south‚ which further split forming our current continents and at some point these land masses had drifted apart to their current positions on
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Continental drift is the movement of the Earth ’s continents relative to each other. The hypothesis that continents ’drift ’ was first put forward by Abraham Ortelius in 1596 and was fully developed by Alfred Wegener in 1912. However‚ it was not until the development of the theory of plate tectonics in the 1960s‚ that a sufficientgeological explanation of that movement was found. |Contents | | [hide] | |1 History
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an area Crust-contains land and ocean floor (50-70 km); solid Mantle-2867 km; solid Lithosphere-crust and uppermost part of the mantle; solid Asthenosphere-soft layer within the mantle Outer core-2‚266 km; liquid Inner core-1‚216 km; solid Pangaea-“super continent”‚ when all continents were connected Subduction-when one continental plate slides under another‚ at a deep-ocean trench Deep-ocean trench-a place in the ocean where subduction occurs Mid-ocean ridge-a place in the ocean where new
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Rosemary Hurrey EAS-101-OL009 10 July 2013 Written Assignment 1 Answer the following questions. 1.Summarize advances over time in determining the age of the Earth‚ including the importance of the discovery or radioactivity. Throughout the past few decades‚ there have been advancements in new techniques to help determine the age of the Earth. Currently scientific evidence believes that the Earth is between 4.5 and 4.6 billions years old. To help determine the age of the earth‚ radiometric dating
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fossils for the same plant or animal on opposite sides of the globe and had wondered how they had traveled from one side to the other. To explain all this‚ Wegener developed the theory that all the continents were once part of a supercontinent called Pangaea. He published these theories in a book called The Origin of Continents and Oceans. His book gained popularity‚ and soon everyone agreed that continents moved up and down‚ not sideways. This
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continents were stuck were they are and they didn’t move. Why did ideas change? -Wegener’s proposed the theory of Continental Drift It proposed that all continents move and that at one time they had all been fused together in a supercontinent called Pangaea. -What evidence did Wegener use to support Continental Drift? -Distribution of: -Mtn. Belts/ Rock types/ Structures Ex: Appalachian Mountains one large continuous mtn. belt US->Canada-> N. Europe -Tillites: sedimentary material dumped
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We ’re of the Future "Hello‚ I am you‚ and you are me. This is a projection of the past‚ future‚ and present of the human race. This is a record of what could have been‚ and what has happened. Welcome to the data base‚" the fading robotic voice crackled into static as it echoed over the vast land‚ the dry waterless surface void of any other sign of life. This is a grim mix of two possible futures‚ and what can become in a mere hundred years. As technology grows and is perfected‚ landscapes and lives
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vertebrate species went extinct. Other extinction events include the Cretaceous- Tertiary and the End Ordovician. The Triassic-Jurassic boundary extinction occurred 200 million years ago during the Phanerozoic eon. The extinction occurred just before Pangaea broke apart. This extinction affected land‚ sea and faunal species like the Permian-Triassic extinction. There is a lot of evidence supporting the extinction at the Triassic-Jurassic boundary. The hypothesis of Sudden Productivity Collapse Associated
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Millions of years ago‚ the current seven continents of the world were unified in a supercontinent known as Pangaea. In order to better understand how continents work‚ our group has created a map making a new continent in another hypothetical Earth. This continent is known as Company Continent. On this landmass‚ there are six cities. These cities are known as Appletopolis‚ Pixar Palace‚ Yum! Brands Village‚ Galaxy Retreat‚ Training Camp‚ and Windows City. The inspiration for the names of the cities
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Geologic time-line (eras & major developments in each) * Precambrian Era: the earth is formed; Canadian shield is formed; bacteria & algae – only life forms * Paleozoic Era: the continents straddle the equator; first insects appear; Pangaea is formed * Mesozoic Era: Dinosaurs rule the earth; first bird & mammals appear * Cenozoic Era: Dinosaurs go
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