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Q: Which one of the following is not a metamorphic rock?
  • A. Slate
  • B. Marble
  • C. Sandstone
  • D. Limestone
Correct Answer: Option D - The word metamorphic means ‘change of form’. These rocks form under the action of pressure, volume and temperature (PVT). Metamorphism occurs when rocks are forced down to lower levels by tectonic processes or when molten magma rising through the crust comes in contact with the crustal rocks or the underlying rocks are subjected to great amounts of pressure by overlying rocks. Metamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganisation of materials within original rocks. Metamorphic Rocks are changed forms of Igneous and sedimentary rocks due to the effects of heat or pressure and newly transformed rocks. Metamorphic rocks are classified into two major groups — foliated rocks and non-foliated rocks. Gneissoid, granite, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rocks.
D. The word metamorphic means ‘change of form’. These rocks form under the action of pressure, volume and temperature (PVT). Metamorphism occurs when rocks are forced down to lower levels by tectonic processes or when molten magma rising through the crust comes in contact with the crustal rocks or the underlying rocks are subjected to great amounts of pressure by overlying rocks. Metamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganisation of materials within original rocks. Metamorphic Rocks are changed forms of Igneous and sedimentary rocks due to the effects of heat or pressure and newly transformed rocks. Metamorphic rocks are classified into two major groups — foliated rocks and non-foliated rocks. Gneissoid, granite, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rocks.

Explanations:

The word metamorphic means ‘change of form’. These rocks form under the action of pressure, volume and temperature (PVT). Metamorphism occurs when rocks are forced down to lower levels by tectonic processes or when molten magma rising through the crust comes in contact with the crustal rocks or the underlying rocks are subjected to great amounts of pressure by overlying rocks. Metamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganisation of materials within original rocks. Metamorphic Rocks are changed forms of Igneous and sedimentary rocks due to the effects of heat or pressure and newly transformed rocks. Metamorphic rocks are classified into two major groups — foliated rocks and non-foliated rocks. Gneissoid, granite, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rocks.