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Answer Posted / nilanjan saha
Sea water has been defined as a weak solution of almost
everything and is indeed a complex solution of mineral salts
and of decayed biologic matter resulting from the teeming
life in the seas. 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. Some of the ocean's salts have been
dissolved from rocks and sediments below its floor. Other
sources of salts include the solid and gaseous materials
that escaped from the Earth's crust through volcanic vents
or that originated in the atmosphere.
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