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musickatia [10]
3 years ago
10

Geographically, a shield and a surrounding platform together are _______________.

Geography
1 answer:
Firdavs [7]3 years ago
6 0

Answer:

The correct answer is D. Synonymous with craton

Explanation:

Craton is referred to as a large immobile block of earth crust composed of ancient crystalline basement rock and have deep lithosphere roots that extends deeply into the earth's mantle.

Cratons are often seen as shields because the basement rock crops out at the surface, and in platforms, the basement is overlaid by sedimentary rock.

Geographically, a shield and a surrounding platform together are synonymous with craton.

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Lithosphere

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Asthenosphere

The asthenosphere is the bottom layer of the mantle. It is a plastic like liquid made up of iron and nickel. The temperature of the asthenospere is 4500 degrees celsius. It is hotter than the lithosphere because it is closer to the inner core. Inside the asthenosphere and lithosphere are currents, they are called convection currents. So because the asthenosphere is less dense or lighter than the lithosphere is forces its way up to the top and foces the lithosphere down. It then cools down then gets forced back down by a hotter substance

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Explanation:

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