earth_sinterior - Earths Interior Earths Earths Layers...

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Earth’s Interior Earth’s Interior
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Earth’s Earth’s Layers Layers Crust Crust : ~10 – 70 km, intermediate composition Mantle Mantle : ~2800 km, mafic composition Outer core Outer core : ~2200 km, liquid iron alloy Inner core Inner core : ~1500 km, solid iron alloy
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Earth’s Interior Earth’s Interior 6370 Crust 0-40 40 2891 5150 solid liquid km 640 How do we know this?
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Earth’s Earth’s Interior Interior Information from: 1) Wells 2) Volcanic eruptions. 3) Seismic waves generated from earthquakes and nuclear explosions.
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Body Waves Body Waves 1) P waves travel through solids and liquids. 6 – 8 km/s 2) S waves can’t travel through liquids. 4 - 5 km/s
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Structure of the Structure of the Earth Earth When waves move from one material to another they change speed and direction.
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Composition of Composition of Earth Earth Continental crust Continental crust : ~2.8 g/cm 3 Oceanic crust Oceanic crust : ~3.2 g/cm 3
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Granodiorite Continental crust Intermediate Basalt avg continental + oceanic crust Oceanic crust - mafic Gabbro
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elements of whole earth elements of whole earth Whole earth chemistry Fe 35% O 30% Si 15% Mg 10% Other 10%
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This note was uploaded on 12/01/2011 for the course SCIENCE 460:100 taught by Professor Staff during the Fall '10 term at Rutgers.

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earth_sinterior - Earths Interior Earths Earths Layers...

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