Useful Data Flashcards by Ellie Kim

Q

Temperature gradient in upper continental crust

A

20-30 degrees celsius / km

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Q

lithostatic pressure gradient

A

c. 30MPa/km

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Q

Density of continental crust

A

less than 3.0Mgm/m^3

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Q

Density of mantle

A

greater than 3.0 Mgm/m^3

c. 3.3Mgm/m^3 below Moho

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Q

Density of oceanic crust

A

c. 2.9 Mgm/m^3

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Q

Density of eclogite

A

less than 3.5 Mgm/m^3

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Q

Average density of Earth

A

c. 5.5 Mgm/m^3

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Q

Seismic velocity of continental crust

A

c. 6.0km.s

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Q

Seismic velocity of the upper mantle

A

c. 8.0km/s

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Q

Thickness of continental crust

A

c. 30km at sea level

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Q

Thickness of oceanic crust

A

c. 8km

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Q

Thickness of crust under tibet

A

c. 70km

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Q

Thickness of crust under the alps

A

c. 50km

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Q

Thermal constant of the lithosphere

A

c. 60Ma

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Q

Elastic thickness of old ocean (100Ma)

A

c. 30km

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Q

Thermal thickness of old ocean (100Ma)

A

c. 125km

Q

Mechanical thickness

A

c. 60km

Q

Seismic thickness (depth of LVZ)

A

c. 125km

Q

Upper/lower mantle boundary

A

c. 650km

Q

Lower mantle/core

A

c. 3000km

Q

Inner core boundary

A

c. 5000km

Q

Radius of the Earth

A

6371km

Q

Depth of mid-ocean ridge

A

c. 2.5km below msl

Q

depth of abyssal plains

A

c. 5km below msl

depth of deepest trenches (e.g. Marianas)

c. 11km below msl

depth of continental shelf

c. 200km below msl

Highest mountains (Everest)

c. 8km above msl

Age of the Earth

c. 4560 Ma

Age of oldest ocean floor (SW Pacific)

c. 180Ma (jurrassic)

Age of oldest continental (Yilgarn, W Australia)

c. 4200Ma (U-Pb on zircon)

Cambrian/Precambrian boundary

c. 570Ma

Paleozoic/Mesozoic boundary

c. 250Ma

Mesozoic/Cenozoic boundary

c. 65Ma

Start of Quaternary / hom sap

c. 2Ma

Shortening from collision of Asia and India

2000km

Thinning in Greece

Continental crust thinned from 35km to 20km. Subsidence of thinned crust lead to creatian of Aegian.