Plate Tectonics II

Plate Tectonics II - MARS 1010 Dr. Yager Plate Tectonics...

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MARS 1010 Dr. Yager Plate Tectonics II: The Theory Read Chapter 3 in Sverdrup and Armbrust Objectives: 1. How does plate tectonic theory explain the following features? Give examples of geographic locations for each type of feature. a) the distribution of shallow and deep earthquakes? Earthquakes that are shallower than 100km are prevalent in the ocean basins along ridges and rises and at trenches where the lithosphere bends and fractures as it is subducted into the mantle. These relatively shallow events are also found in continental regions that are undergoing significant deformation. Earthquakes deeper than 100km are generally associated with the subduction of oceanic lithosphere. The deeper the earthquakes are, the farther they are displaced inland away from the trench beneath continents or island arcs. b) normal, reverse, and strike-slip faults? Normal- A fault in which the hanging wall has moved downward relative to the footwall. Reverse- a fault in which the hanging wall has moved upward relative to the footwall. Strike-slip faults- a fault in which surfaces on opposite sides of the fault plane have moved horizontally and parallel to the strike of the fault. c) the distribution of volcanoes? of other types of mountains? Volcanoes are mostly distributed around plate boundaries such as the ring of fire. Some mountains are formed by diverging plates. d) fracture zones?
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Plate Tectonics II - MARS 1010 Dr. Yager Plate Tectonics...

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