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04/15/1004/15/10 SeeS / GeologySeeS / Geology 11
SeeSSeeSGeologyGeology
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GeologyGeology Is the study of the Earth, and the things that make Is the study of the Earth, and the things that make
it up. it up.
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Structure of EarthStructure of Earth Much of planet Much of planet
is actually is actually liquid, because liquid, because it is so hot it is so hot inside. inside.
The outside (the The outside (the surface) is cool surface) is cool and is solid and is solid rock.rock.
We have We have learned that the learned that the Earth’s surface Earth’s surface floats on the floats on the liquid rock liquid rock below.below.
Core
Mantle
LithosphereCrust
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Plate TectonicsPlate Tectonics We have found that the surface of the Earth is We have found that the surface of the Earth is
made of ‘plates’ that float on the liquid mantel.made of ‘plates’ that float on the liquid mantel. The Plates of rock that make up The Plates of rock that make up
our planet’s surface are kind of our planet’s surface are kind of like lily pads on a pond. Except like lily pads on a pond. Except they cover the whole thing.they cover the whole thing.
The Plates can bump The Plates can bump together or scrape each together or scrape each other and cause other and cause Earthquakes, volcanoes, Earthquakes, volcanoes, and tsunamis.and tsunamis.
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VolcanoesVolcanoes Volcanoes are an Volcanoes are an
opening in the crust to opening in the crust to the Mantle below.the Mantle below.
MagmaMagma (melted rock (melted rock underground) can underground) can come out of this come out of this opening onto the opening onto the surface where it will surface where it will be be lavalava (melted rock (melted rock above ground).above ground).
Volcanoes can release Volcanoes can release a lot of energy.a lot of energy. Magma Chamber
Crater
Ash Cloud
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Some Volcano ImagesSome Volcano Images
Active volcano Mount St. Helens shortly after the eruption of 18 May 1980
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Some Volcano ImagesSome Volcano Images
January 2009 image of the rhyolitic lava dome of Chaitén Volcano southern Chile during its 2008-2009 eruption.
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Some Volcano ImagesSome Volcano Images
Indonesia - Lombok: Mount Rinjani 1995
