This set of Engineering Geology Multiple Choice Questions & Answers (MCQs) focuses on “Important Metamorphic Rocks – 01”.
1. Slate is originated from which rock?
a) Sandstone
b) Granite
c) Shale
d) Basalt
View Answer
Explanation: Slate is a product of low-grade regional metamorphism of argillaceous rocks like clays and shales.
2. Low grade schist is formed under what conditions?
a) Low temperature and local metamorphism
b) High temperature and local metamorphism
c) Low temperature and regional metamorphism
d) Low temperature and regional metamorphism
View Answer
Explanation: Low grade schists are formed under conditions of regional metamorphism at low temperature. These are rich in minerals like albite, muscovite and chlorite that are unstable at high temperature.
3. What is the grain size of slate rock?
a) Fine
b) Medium
c) Coarse
d) Very coarse
View Answer
Explanation: Slate is an extremely fine-grained metamorphic rock characterized by a slaty cleavage by virtue of which it can be readily split into thin sheets having parallel smooth surfaces.
4. High grade schist is formed under what conditions?
a) Local metamorphism
b) Regional metamorphism
c) Displacement metamorphism
d) Chain metamorphism
View Answer
Explanation: High grade schists are formed under conditions of regional metamorphism and atoms rich in minerals that are stable at high temperatures such as garnet.
5. Examples of high grade schist is ___________
a) Talc- schist
b) Garnet-schist
c) Chlorite-schist
d) Mica-schist
View Answer
Explanation: Garnet-schists, cordierite-schists and staurolite-schists are common examples of some high grade schists.
6. Special property of talc schist is __________
a) Colour
b) Its structure
c) Soapy feel
d) Good odour
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Explanation: Talc schist is a low grade schist and its special property is that it gives a soapy feel when touched with bare hands.
7. Gneiss formed from sedimentary rock is called __________
a) Orthogneiss
b) Paragneiss
c) Banded gneiss
d) Augen gneiss
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Explanation: Paragneiss are formed from the metamorphism of sedimentary rocks like sandstone. Orthogneiss formed as a result of metamorphism of granites and other igneous rocks.
8. The similar type of rock to quartzite which is sedimentary is __________
a) Compound quartzite
b) Orthoquartzite
c) Holo-quartzite
d) Accu-quartzite
View Answer
Explanation: The name orthoquartzite is used for a sedimentary rock of similar composition but having different origin, in which quartz grains are cemented together by siliceous cement.
Sanfoundry Global Education & Learning Series – Engineering Geology.
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