Sentences with phrase «weathering of igneous rocks»
Not exact matches
Most of the ocean's salts were derived from gradual processes such the breaking up of the cooled igneous rocks of the Earth's crust by weathering and erosion, the wearing down of mountains, and the dissolving action of rains and streams which transported their mineral washings to the sea.
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Most of Australia's landscape is covered in a blanket of weathered rock, sediments and igneous rocks, effectively «hiding» the surface where mineral deposits lie.
A further reduction by carbonate sediment dissolution, and reactions with igneous rocks, such as silicate weathering and sediment burial, will take anything from tens to hundreds of thousands of years, or even longer.