The lower mantle is composed of magnesium, iron-bearing silicates, olvine, and pyroxene.
Biochemical limestone is when the calcium carbonate is locked into the fossil shells and skeletons of marine organisms.
But chemical limestone is when the calcium carbonate is in the form of calcite mineral crystals.
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Answer:
B. South India and Sri Lanka
Explanation:
Overgrazing, overcropping, deforestation
Petroleum : n
aluminum : r
dirt : r
salmon : r
coal : n
