What is Black Limestone

What is Black Limestone?The most fresh water and the sea water contain the calcium carbonate which dissolves black limestone. When the calcium carbonate crystallizes when the explanation, all limestones are formed. It leaves the explanation in many aspects, and each way causes a different limestone. All different types may divide two groups. The first group including forms nearly completely, does not use the limestone which the organism aids. When water evaporation, this kind of limestone is forced outside the explanation. Such black limestone evaporation occurs in many coral reef hot salt water lake and in the most shallow tropics seas. The high temperature creates in the superficial water evaporation.The second group limestone works the formation by the organism. Many aquatic organism picture calcium carbonate outside water, and uses it to make their shell and the bone. The oyster, the clam, the snail, the coral and the sea naughty child makes this.
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