EPSC 201 October 7th Notes

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Department
Earth & Planetary Sciences
Course
EPSC 201
Professor
Anthony Williams- Jones
Semester
Fall

Description
Understanding Planet Earth October 7, 2013 Hot spots and mantle plumes • A mantle plume is a posited thermal abnormality where hot rock nucleates  at the core­mantle boundary and rises through the Earth's mantle becoming  a diapir in the Earth's crust. • Outer core is liquid­ swirling around • Transfer of heat  • Will move up rapidly from the core • At some point in the lithosphere melting will occur because it is so hot in  the outer core and the rocks are extremely dense • Mantle plume will be stationary for long periods of time • Possibly continental plate will be sliding across it  • Stationary plume and plate moving across it as it moves volcanoes occur • Magma rises from the mantle plume and creates magma to set off a volcano • Rifting is the process by which the continental lithosphere stretches. A  Continental rift is the belt or zone of the continental lithosphere where the  extensional deformation (rifting) is occurring.  These zones have important  consequences and geological features, and if the rifting is successful, lead  to the formation of new ocean basins. MINERALOGY  Minerals and crystals • A naturally occurring solid compound­ mineral • Crystal­ the form a compound will take from the arrangement of atoms • Crystal­ A piece of a homoge
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