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Difficulty: EasyRock Types, Formation, and Economic Importance

Match each rock type in Column I with its corresponding formation characteristic or economic importance in Column II.

  • MarbleMetamorphic rock formed from limestone, used extensively for sculpture and decorative building material
  • CoalOrganically formed sedimentary rock derived from plant matter, used as a primary energy fuel source
  • BasaltExtrusive igneous rock formed by rapid cooling of lava on the Earth's surface

Answer

Marble corresponds to the metamorphic rock formed from limestone used for decorative building; Coal corresponds to the organically formed sedimentary rock used as an energy fuel source; Basalt corresponds to the extrusive igneous rock formed by rapid cooling of lava.
Marble matches the metamorphic rock derived from limestone; Coal matches the organically accumulated sedimentary rock; Basalt matches the extrusive igneous rock formed from surface lava cooling.

Step-by-Step Solution

1
Examine Marble's origin and characteristics
Marble is a metamorphic rock formed by heat and pressure acting on limestone (parent rock).
Metamorphic processes alter pre-existing rocks without melting them.
2
Examine Coal's origin and characteristics
Coal is formed from dead vegetative matter in swampy environments, making it an organic sedimentary rock.
Sedimentary rocks can be formed mechanically, chemically, or organically.
3
Examine Basalt's origin and characteristics
Basalt cools rapidly from erupted lava on the Earth's surface, making it fine-grained and extrusive igneous.
Igneous rocks formed outside the Earth's crust are extrusive or volcanic.

Key Concept

Classification of major rock types, their formation processes, and economic applications
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Topics

Rock Types, Formation, and Economic Importance

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