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Zorluk: KolayRock Types, Formation, and Economic Importance

Match each rock listed in Column I with its correct classification, characteristic texture, or primary economic application in Column II.

  • ObsidianExtrusive igneous rock with a glassy texture formed by rapid cooling of lava
  • GypsumChemical sedimentary rock formed by evaporation, widely used in making plaster of Paris
  • AnthraciteHigh-rank organic metamorphic rock with high carbon content, used as a clean-burning fuel
  • QuartziteHard, non-foliated metamorphic rock derived from quartz sandstone, resistant to weathering

Cevap

Obsidian matches with the extrusive igneous rock with a glassy texture; Gypsum matches with the chemical sedimentary rock formed by evaporation used for plaster of Paris; Anthracite matches with the high-rank organic metamorphic rock used as fuel; Quartzite matches with the hard, non-foliated metamorphic rock derived from quartz sandstone.
Each rock is paired accurately according to its genetic rock family and physical/economic properties: Obsidian is a glassy extrusive igneous rock, Gypsum is an evaporite chemical sedimentary rock used in construction, Anthracite is an organic metamorphic coal with high heat value, and Quartzite is a durable metamorphic rock derived from sandstone.

Adım Adım Çözüm

1
Identify the origin and texture of Obsidian.
Obsidian is volcanic glass formed by rapid cooling of lava without crystallization.
Rapid surface cooling prevents mineral crystals from forming.
2
Identify the formation process and economic use of Gypsum.
Gypsum is a chemical evaporite used in building materials like plaster of Paris.
Evaporation leaves behind calcium sulfate deposits.
3
Identify the classification and composition of Anthracite.
Anthracite is metamorphosed organic material rich in carbon.
Heat and pressure transform peat/lignite into hard metamorphic coal.
4
Identify the parent rock and resistance of Quartzite.
Quartzite is formed from quartz sandstone via recrystallization.
Metamorphism locks quartz mineral grains into a dense interlocking matrix.

Anahtar Kavram

Rock Types, Formation, and Economic Importance
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