Plate tectonics

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March 22 2021
Gabriela Martina Rodríguez Díaz
Mind Map by Gabriela Martina Rodríguez Díaz, updated more than 1 year ago
Gabriela Martina Rodríguez Díaz
Created by Gabriela Martina Rodríguez Díaz over 3 years ago
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Plate tectonics
  1. Alfred Wegener
    1. Alfred Wegener wrote his book, The Origin of Continents and Oceans, in 1912, First proposed his hypothesis in 1915.
    2. Henry Hess
      1. Harry Hess was a geologist. During World War II, he was also commander of naval submarines. The task was to study the deepest part of the seabed. He proposed in 1960 that continental movement is the result of submarine proliferation. Molten magma from below the crust may overflow between the plates and the rift valley. Hess cruised and clarified the broken continents that were once connected. These are the seven continents we are familiar with. But the plates move and change shape.
      2. Plate tectonics
        1. the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates
        2. Sea floor spreading
          1. Seafloor Spreading: We need evidence.  The first evidence is the ocean floor. There are active fractures in the lithosphere around the ocean floor, In a pattern that mimics the shape of the continental coastline.  The age of the sea floor Rock increases as you get further away from the mid-ocean ridge. The thickness of the layer of sediments and the ocean floor increases as you get further away from the mid-ocean ridge.
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