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What organic materials make up limestone?

What type of mineral and what percent of it determine if a rock is limestone? (Refer to Site 2)

Answer :

Final answer:

Limestone is primarily made of calcium carbonate, mainly derived from marine organisms. To be classified as limestone, a rock must contain at least 50% calcium carbonate. Additionally, it can include dolomite as a mineral component.


Explanation:

What Organic Materials Make Up Limestone?

Limestone is primarily composed of organic materials such as calcium carbonate, which is derived from the remains of marine organisms like corals and mollusks. Over time, these organisms accumulate and their shells contribute to the formation of limestone. In addition to biological materials, limestone can also contain minerals such as dolomite.

Types and Percentages of Minerals in Limestone

For a rock to be classified as limestone, it must contain at least 50% of calcium carbonate by weight. If the rock contains a significant amount of dolomite, it might be referred to as dolomitic limestone, which has a distinct composition.


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