Geologically marble is known asa)calcareous rock... moreb)argillaceous rockc)metamorpihic rockd)silicious rockCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Geologically marbe is a metamorphic rock.Chemically marble is a calcareous rock.

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It's a metamorphic rock

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Chemically marble is calcareous but geologicaly it is metamorphic.

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Calcerious rock

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Right answer will be A

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Chemically marble is calcareous

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Its should be ans A....its asking about geologically formation not chemically formation

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Because marble is obtained from the metamorphism of limestone which is calcium carbonate and thus having high percentage of calcium makes it calcareous rock

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A

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A

Answer

Metamorphic Rock - Marble

Metamorphic rock:
Marble is a type of metamorphic rock. Metamorphic rocks are formed from pre-existing rocks through a process called metamorphism. This process involves the transformation of the original rock due to changes in temperature, pressure, and sometimes the addition of fluids. Marble is formed from limestone or dolomite rocks that undergo metamorphism.

Formation of marble:
Marble is primarily composed of calcium carbonate, which is the main mineral found in limestone and dolomite rocks. When these rocks are subjected to heat and pressure, the minerals within them recrystallize, resulting in the formation of marble.

Recrystallization:
During metamorphism, the minerals in the original rock rearrange themselves to form new minerals with different crystal structures. In the case of marble, the calcium carbonate crystals in limestone or dolomite are transformed into larger, interlocking crystals of calcite or dolomite.

Characteristics of marble:
Marble is known for its characteristic appearance and properties, including:

1. Color and veining: Marble comes in a variety of colors, including white, gray, pink, green, and black. It often features intricate veining patterns, which are a result of impurities and mineral inclusions during its formation.

2. Hardness: Marble is relatively soft compared to other types of metamorphic rocks. It has a Mohs hardness scale rating of 3-4, which means it is susceptible to scratching and can be polished to a smooth, glossy finish.

3. Uses: Due to its aesthetic appeal and workability, marble has been used for various purposes throughout history. It is commonly used in construction for flooring, countertops, wall cladding, and decorative elements.

4. Durability: Although marble is not as hard as granite or quartzite, it still exhibits good durability and resistance to heat and moisture. However, it is more susceptible to chemical weathering and can be damaged by acidic substances.

In conclusion, marble is a metamorphic rock that forms from the recrystallization of limestone or dolomite rocks. It is characterized by its unique colors, veining patterns, and relative softness. Its aesthetic appeal and durability make it a popular choice for various architectural and decorative applications.

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