Download Interior of the Earth

Interior of the Earth
Interior of the Earth
I. Morphology of Earth's Interior
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
1. continental rocks (ave: 35 km thick)
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
1. continental rocks (ave: 35 km thick)
•
granitic/andesitic in composition
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
1. continental rocks (ave: 35 km thick)
•
granitic/andesitic in composition
•
Rich in K, Si, Al
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
1. continental rocks (ave: 35 km thick)
granitic/andesitic in composition
•
Rich in K, Si, Al
•
Less dense than oceanic
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
2. oceanic rocks (ave: 5 km thick)
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
2. oceanic rocks (ave: 5 km thick)
•
basaltic in composition
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
2. oceanic rocks (ave: 5 km thick)
•
basaltic in composition
•
rich in Mg, Ca, Fe
Interior of the Earth
I. Morphology of Earth's Interior
A. Crust (ave thickness: 20 km)
2. oceanic rocks (ave: 5 km thick)
•
basaltic in composition
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rich in Mg, Ca, Fe
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more dense than contin. Rx
I. Morphology of Earth's Interior
B. Mantle (thickness: 2885 km)
I. Morphology of Earth's Interior
B. Mantle (thickness: 2885 km)
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Contains 80% of earth’s volume
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Knowledge????
I. Morphology of Earth's Interior
B. Mantle (thickness: 2885 km)
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Contains 80% of earth’s volume
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Knowledge????
•
Composition: Olivine (Rock:
Peridotite)
I. Morphology of Earth's Interior
B. Mantle (thickness: 2885 km)
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Contains 80% of earth’s volume
•
Knowledge????
•
Composition: Olivine (Rock:
Peridotite)
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Behaves like Silly Puddy
I. Morphology of Earth's Interior
B. Mantle (thickness: 2885 km)
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Contains 80% of earth’s volume
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Knowledge????
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Composition: Olivine (Rock: Peridotite)
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Behaves like Silly Puddy
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“solid like the crust, but elastic at the
same time”
C. Features found within crust and
mantle
1. Lithosphere (Rigid)
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includes the entire crust and part of
the upper mantle
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behaves as a brittle solid
2. Astenosphere – (weak)
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not a total liquid; partially molten (1400 C)
easily deformed
analog to red-hot iron
3. Moho Discontinuity
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*Discovered by Yugoslavian scientist (1909)
Found evidence of layering of earth through seismic wave
velocities
Boundary separates crustal rocks from mantle rocks
02_14.jpg
D. Outer Core (thickness = 2270 km)
D. Outer Core (thickness = 2270 km)
• 2270 km radius
• liquid
D. Outer Core (thickness = 2270 km)
• 2270 km radius
• liquid
• composed of iron, and minor amounts
of sulfer. Trace amounts of Si, O, Ni,
K
• The Evidence???
E.
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Inner Core
thickness = 1216 km
solid
Dominantly Fe in composition,
Traces of Ni
The Evidence??