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Which of the following is a calcareous rock?
1. Dolomite
2. Laterite
3. Quartzite
4. Gneiss

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Correct Answer - Option 1 : Dolomite

According to the chemical classification of rocks, they are classified as follows

1) Argillaceous rocks:

The rocks which contain clay or alumina as a main constituent is called argillaceous rocks.

Ex: Slate, Laterite, and Kaolin

2) Siliceous rocks:

The rocks which contain silica as the main constituent is called as siliceous rocks

Ex: Granite, Gneiss, Trap, Basalt, Sandstone, and Quartzite.

3) Calcareous rocks:

The rocks which contain lime or calcium as the main constituent are called calcareous rocks.

Ex: Marble, Limestone, and Dolomite

According to geological classification, rocks are classified as

1) Igneous rocks:

Ex: Granite, Basalt, Trap, and Dolerite

2) Sedimentary rocks:

Ex: Sandstone, Shale, Limestone, and Laterite

3) Metamorphic rocks:

Ex: Marble, Quartzite, Slate, and Schist

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