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Plate Tectonics Impact on Geography
Transcript of Plate Tectonics Impact on Geography
What is Plate Tectonics?
Plate Tectonics is a theory that the earths crust, the lithosphere, is adrift atop the upper mantle, the athenosphere. Pieces of the lithosphere, plates, are constantly moving atop the mantle.
"Continental Fit" was noted as early as 1596 by geographer Abraham Ortelius
Others to note continental fit: Sir Francis Bacon and Ben Franklin
Alfred Wegener, coined "continental drift" and formed the theory of Pangaea
225 m.y.a. all land masses formed a supercontinent.
Scientific testing of these theories in the 1950s and 1960s confirmed Weneger's concepts are universally accepted
What is the Plate Tectonics process?
1. Upwelling of magma
2. Lithoshperic plate movements
3. Seafloor spreading
4. Lithospheric subduction
5. Earhquakes, volcanic activity
6. Lithospheric deformation
New crust is formed by upweling of magma from the earths athenosphere
The plates spread apart with the creation of new land
Rift Valley Africa
Two plates move into one another causing the destruction of earths crust
Subduction - one plate moves under the other
Classic convergent - two plates collide and cause large mountains
Two plates grind past each other
Neither creating nor destroying crust
Who can name an example of this type of crustal movement?
Plate Boundaries and Movements
How does this Impact Geography?
Plate tectonics help to explain the location of the worlds basic physical features such as continents, mountains, escarpments
Explain the location of natural hazards such as earthquakes and volcanos
Explain the location of natural resources such as fertile soil and orr
How does Plate Tectonics Impact Human Geography?
Determines our continents
Impacts our political geography i.e. settlements, cities, countries
Helps to decide if two countries go to war
How economic goods are transported
Natural disasters prone to a region
Natural resources found in a region, coal in the Appalachian Mountains
How a language develops
How does physical geography affect modern day living?
Let's Discuss in terms of plate tectonics..
Plate tectonics is responsible for the movement of earth's plates
Movement can happen through divergence, convergence or transform processes
The result of these movements are mountain ranges, rifts, earthquakes, volcanoes
The impact of these movements is vast and touch nearly every facet of modern life, including
Where humans settle
Transport of economic goods
Engineering feats to overcome physical challenges
railroads through and over mountains
Natural disaster mitigation
Tsunami zones, earthquake-ready bridges and buildings