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The "mantle convection" mechanism was proposed by a British geologist, Arthur Holmes in his book "Radioactivity and Earth Movement" in 1929.

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About fifty percent of the total volume of a good quality soil consists of pore spaces.

The A horizon of a soil is also called the topsoil.

Oxidation is an important mechanism in decomposing such ferromagnesian minerals as olivine, pyroxene, and hornblende.

Biological activity has little influence on the process of weathering

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