L05_11-13_Sept_Earth_Interior(1)

L05_11-13_Sept_Earth_Interior(1)

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Unformatted text preview: 4400 – 6100° C. Solid inner core Solid core of Earth with a radius of ~1200 km. Iron- nickel Mg, Fe Silicates alloy. ~6000° C. Grows slowly by Primarily Fe, crystalliza>on (freezing) of liquid outer minor N c core. The i rystalliza>on releases heat that, along with radioac>ve decay, keeps the interior of the Earth hot. 37 composi>onal structure of Earth Crust Low density, Si- and Al- enriched rocks. Subdivided into con>nental crust (~20- 60 km thick) and oceanic crust (~10 km thick). Typical density ~ 2700 kg/m3 Common minerals, con>nental crust: Quartz SiO2 Alkali feldspar KAlSi3O8 Plagioclase feldspar CaAl2Si2O8 Mg, Fe Silicates Primarily Fe, minor Ni Calcite CaCO3 38 Typical Con>nental Crust Rocks Grani>c rock Granite (Half Dome, Yosemite NP, California) Limestone Gneiss 39 composi>onal structure of Earth Crust Low density, Si- and Al- enriched rocks. Subdivided into con>nental crust (~20- 60 km thick) and oceanic crust (~10 km thick)....
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This document was uploaded on 03/26/2014 for the course GEC AS.270.103 at Johns Hopkins.

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