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Alfred Wegner

Alfred Wegner. Early 1900’s. Continents are drifting apart from one another. Similar fossils found on both sides of the ocean suggest continents were once together. Similar types of rock and evidence of some ancient climatic conditions were found on different continents.

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Alfred Wegner

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  1. Alfred Wegner Early 1900’s Continents are drifting apart from one another Similar fossils found on both sides of the ocean suggest continents were once together Similar types of rock and evidence of some ancient climatic conditions were found on different continents

  2. New oceanic Lithosphere forms at mid-ocean ridges Center of Atlantic Ocean. It explains how the ocean can get bigger and push contents apart

  3. Sea Floor Spreading 6:54 Animation

  4. When the polarity of Earth’s magnetic field change. (North & South magnetic poles switch.) Align with the Earth’s magnetic field As new rock forms at mid-ocean ridges, magnetic minerals have alternating bands depending on the polarity at the time it forms It shows that sea floor is slowly being added to crust & it is spreading out

  5. Single, huge continent that was made up of all of today's continents 245 million years ago

  6. Speed and direction of wave Composition (material it is made up of. Crust mantle core) Structure (5 physical layers. Lithosphere, Asthenosphere, Mesopshere, Outer and Inner Core) So that tectonic plates can move on to of it. Plates are moving apart As plates move apart magma rises to fill gap left between plates

  7. Rock is new to Lithosphere. It recently solidified after rising as a liquid in the asthenosphere. Once it is solidified minerals are stuck in that position Because earth’s crust is being destroyed somewhere else. west

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