Earthquakes, Faults, Rock Stresses, and Tsunamis
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PRESENTATION OUTLINE
ROCK STRESSES
Photo by Oliver Paaske
SHEARING
The shearing rock stress is much like the transform plate boundary. Two rocks slide against each other. You can think of it like shearing a sheep (the shear slides against the sheep). Shearing can happen when rocks are pushed in different directions. Parts of the rock can break off, and even cause small earthquakes because of friction (according to sciencing.com).
Photo by Oliver Paaske
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COMPRESSION
Like the convergent plate boundary, the compression rock stress is two plates (in this case, rocks), pushing against each other. You can demonstrate this by pushing your hands together. Mountains are an example of what happens because of this rock stress.
Photo by Oliver Paaske
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TENSION
Tension is like the divergent plate boundary because the rocks/plates go away from each other. It is the opposite of compression. This can form rift valleys. Some scientists think tension caused Pangaea to break apart into the seven continents.
Photo by Oliver Paaske
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FAULTS
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A normal fault is a where the hanging wall moves downwards compared to the foot wall. This can cause parts of rocks to lengthen.
Photo by Oliver Paaske
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A reverse fault is the opposite of a normal fault. The hanging wall block is above the foot wall block, because the hanging wall is thrust higher. It is also called a thrust fault and a dip-slip fault.
Photo by Oliver Paaske
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EARTHQUAKES + TSUNAMIS
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Earthquakes are caused when a transform plate boundary starts to shake, along a fault line. The two plates start rubbing against each other, shacking the ground, and causing buildings to collapse. Often, fires start.
Photo by Oliver Paaske
Tsunamis happen when an underwater fault line (a transform boundary on an oceanic plate) is active. Just like an earthquake, the plates start to shake, causing a huge wave that ultimately can destroy entire cities. Sometimes buildings catch on fire while floating in the water, causing even more damage.
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VIDEOS
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BIBLIOGRAPHY
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PHOTO
- https://www.teachengineering.org/content/cub_/lessons/cub_rock/cub_rock_les...
- https://www.teacheng
- https://www.slideshare.net/mobile/sciencepowerpointcom/earthquakes-geology-...
- Haiku Deck
- https://en.m.wikibooks.org/wiki/High_School_Earth_Science/Stress_in_the_Ear...
- http://www.geologypage.com/2017/10/three-main-types-faults.html
Photo by Kevin M. Gill
