the earth’s interior
Post on 10-Feb-2016
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The Earth’s Interior
The Earth’s Interior Most of what we know is from geophysics
Evidence from Seismic Waves Seismic Reflection Seismic Refraction
Earth’s Internal Structure The Core
P-wave Shadow Zone S-wave Shadow Zones Liquid Outer Core Solid Inner Core
S-Wave Shadow Zone
Earth’s Internal Structure
The Earth’s Crust Continental crust- sial
Less dense and thicker than oceanic crust Oceanic crust- sima Mohorovicic discontinuity
P-Wave Velocities & Boundaries
Moho
Earth’s Internal Structure The Mantle
Ultramafic Rock Lithosphere
Crust & uppermost mantle Asthenosphere
Low velocity zone Lower mantle
Earth’s Internal Structure Composition of the Core
Made of metal The Core-Mantle Boundary
Convection in both core and mantle
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