Question

Which one of the following rocks is not correctly matched?
1. Igneous Rocks-Basalt
2. Sedimentary Rocks-Shale
3. Metamorphic Rocks-Regur
4. All the above

Answer 1

Correct Answer - Option 3 : Metamorphic Rocks-Regur

The correct answer is Metamorphic Rocks-Regur.

• The scientific study of rocks is called petrology.
• Based on the mode of formation three major groups of rocks are defined
• Igneous-
  • Igneous rocks form when molten rock (magma or lava) cools and solidifies.
  • Granite, gabbro, basalt, are some of the examples of igneous rock.
• Sedimentary-
  • Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water.
  • They accumulate in layers. 
  • Sandstone, conglomerate, limestone, shale, loess, limestone, halite, potash are examples of sedimentary rocks.
• Metamorphic-
  • Metamorphic rocks result when existing rocks are changed by heat, pressure, or reactive fluids, such as hot, mineral-laden water. 
  • Gneissoid, slate, schist, marble, quartzite, etc. are some examples of metamorphic rocks.
• Regur is a type of soil that is found in the Gujarat and Maharashtra region of India.