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

Q

depth of deepest trenches (e.g. Marianas)

A

c. 11km below msl

Q

depth of continental shelf

A

c. 200km below msl

Q

Highest mountains (Everest)

A

c. 8km above msl

Q

Age of the Earth

A

c. 4560 Ma

Q

Age of oldest ocean floor (SW Pacific)

A

c. 180Ma (jurrassic)

Q

Age of oldest continental (Yilgarn, W Australia)

A

c. 4200Ma (U-Pb on zircon)

Q

Cambrian/Precambrian boundary

A

c. 570Ma

Q

Paleozoic/Mesozoic boundary

A

c. 250Ma

Q

Mesozoic/Cenozoic boundary

A

c. 65Ma

Q

Start of Quaternary / hom sap

A

c. 2Ma

Q

Shortening from collision of Asia and India

A

2000km

Q

Thinning in Greece

A

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