Interior of the Earth. I. Morphology of Earth's Interior.

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Presentation transcript:

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 rich in Mg, Ca, Fe 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) Contains 80% of earth’s volume Knowledge????

I. Morphology of Earth's Interior B. Mantle (thickness: 2885 km) Contains 80% of earth’s volume Knowledge???? Composition: Olivine (Rock: Peridotite)

I. Morphology of Earth's Interior B. Mantle (thickness: 2885 km) Contains 80% of earth’s volume Knowledge???? Composition: Olivine (Rock: Peridotite) Behaves like Silly Puddy

I. Morphology of Earth's Interior B. Mantle (thickness: 2885 km) Contains 80% of earth’s volume Knowledge???? Composition: Olivine (Rock: Peridotite) Behaves like Silly Puddy “solid like the crust, but elastic at the same time”

C. Features found within crust and mantle

1. Lithosphere (Rigid) includes the entire crust and part of the upper mantle behaves as a brittle solid

2. Astenosphere – (weak) not a total liquid; partially molten (1400 C) easily deformed analog to red-hot iron

3. Moho Discontinuity *Discovered by Yugoslavian scientist (1909) Found evidence of layering of earth through seismic wave velocities Boundary separates crustal rocks from mantle rocks

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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. Inner Core thickness = 1216 km solid Dominantly Fe in composition, Traces of Ni The Evidence??