Sedimentary
granite
Sedimentary.
The dominant rock type of the upper mantle is peridotite.
Sandy to silty soils would likely be the most prevalent in the arctic, due to the glacial action which breaks down the rock into non-polar particles.
The arctic tundra has poor soil
Sedimentary.
sedimentary
granite
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Basalt is the dominant rock in the ocean crust. And I assume Granite is dominant for continental crust.
Sedimentary.
The dominant rock type of the upper mantle is peridotite.
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Sandy to silty soils would likely be the most prevalent in the arctic, due to the glacial action which breaks down the rock into non-polar particles.
What the central lowlands are depends greatly on which country or region is being discussed. In general, central lowlands would be centrally located low plains type of land.
The most dominant type of erosion on earth is running water.
They would be referred to as contact metamorphic rocks.