martes, 26 de septiembre de 2017

4ESO. U1. Internal Geodynamics.



Descarga de la presentación: PDF con 2 diapositivas por hoja.
Descarga de la presentación: PDF con 4 diapositivas por hoja.

Bigger size by clicking the image.





Exercise:

1. The following figure represents the seismic waves velocity, in an imaginary planet. Answer the questions:

  • What is a discontinuity? How many discontinuities do you observe? Where are they?
  • Is it a homogeneus or heterogeneus internal structure? Explain your answer.
  • How many layers are there? Describe their structure and states of matter.


Plate tectonics explained.


CONVERGENT BOUNDARY: Lithosphere is destroyed.

DIVERGENT BOUNDARY: Plates separation creates new lithosphere, when magma released in ridges, solidifies.

Remember there are also TRANSFORM  BOUNDARIES. I couldn't find a good animation of it. Plates move following the same line but opposite directions.

HOT SPOT: Hot upwelling mantle materials, or mantle plumes, that come from the mantle-core limit; they ascend to the upper mantle; generating lithosphere phenomena.


Bigger size by clicking the image.
Wilson's Cycle


Bigger size by clicking the image.


martes, 19 de septiembre de 2017