Civil Engineering - Building Materials - Discussion

31. 

Gniess is obtained from

[A]. igneous rocks
[B]. metamorphic rocks
[C]. sedimentary rocks
[D]. sedimentary metamorphic rocks.

Answer: Option D

Explanation:

No answer description available for this question.

Swastik said: (Dec 17, 2013)  
I think Gniess is metamorphosed from Granite, then how it is sed. meta. rock?

Jishna said: (Jan 27, 2014)  
Gneiss is obtained from igneous metamorphic rocks.

Abhishek said: (Feb 15, 2014)  
Gneiss is obtained from Igneous metamorphic rocks.

Amit Karn said: (Jun 29, 2014)  
Gneiss is a widely distributed rock which undergo various metamorphic processes from already existing either igneous or sedimentary rock. So you have to choose wider one. That is sedimentary metamorphic rock.

Ishor said: (Feb 2, 2016)  
Gneiss is a rock with higher crushing strength and basically having good mechanical properties in comparison to other metamorphic rock. So it is obtained from metamorphic action over granite and granite is igneous rock.

Rocks come from metamorphic action of sedimentary rocks are weak in mechanical properties in comparison to comes from metamorphic action of igneous rock.

Partha Das said: (Feb 7, 2016)  
It is metamorphic rock which obtains from granite.

Adnan Guru said: (Aug 21, 2016)  
Igneous rock is decomposed to gneiss by metamorphic action. D is absolutely wrong. The right answer will be A.

Sohan Jangra said: (Sep 29, 2016)  
Gneiss is a metamorphic rock with a banded or foliated structure, typically coarse-grained and consisting mainly of feldspar, quartz, and mica.

Sohan Jangra said: (Sep 29, 2016)  
Gneiss is a high-grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.

Naksh said: (Oct 7, 2016)  
Which is the correct answer?

Ramavtar said: (Oct 11, 2016)  
Gneiss is a widely distributed rock which undergoes various metamorphic processes from already existing either igneous or sedimentary rock. So you have to choose wider one. That is sedimentary metamorphic rock.

Baljeet Chaudhary said: (Oct 16, 2016)  
Which is the correct answer? Please tell me one answer.

Mehebub said: (Oct 23, 2016)  
According to me, Option A is the correct answer.

Avinash Tripathi said: (Nov 7, 2016)  
Gneiss is a metamorphic rock which is obtain from granite.

So option A is correct.

Nitika said: (Nov 25, 2016)  
Yes, the Correct answer is A.

Krishna Sharma said: (Dec 3, 2016)  
Gniess is changing from granite (igneous rock).

Sreejith Tk said: (Dec 3, 2016)  
Its answer is metamorhic.

Umesh said: (Dec 9, 2016)  
Gnesis is obtained from granite.

Shubham said: (Dec 18, 2016)  
It has same use as granite.

Dipen Tilva said: (Jan 6, 2017)  
Gneisses result from the metamorphism of many igneous or sedimentary rocks, and are the most common types of rocks found in Precambrian regions. Gneiss is found in New England.

Baloch said: (Jan 18, 2017)  
Gniess made through metamorphic action of a sedimentary rock called 'laterite'.

In this way guiess is sedimentary metamorphic rock.

Suman said: (Feb 4, 2017)  
Gneiss is a high grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of a granite, or sedimentary rock.

Gneiss displays distinct foliation, representing alternating layers composed of different minerals.

Vibinkrishna said: (Mar 8, 2017)  
According to me, Option A will be the correct answer.

Subhodeep said: (Apr 1, 2017)  
Correct Answer is sedimentary-metamorphic rocks because Gniess is obtained from igneous as well as sedimentary rocks after the metamorphic action.

Vinoth said: (Jul 13, 2017)  
Gniess is obtained by metamorphism action of granite. The granite is igneous. So the gneiss obtained from igneous rock.

Ravi S Murnal said: (Aug 19, 2017)  
Gneiss IS a Metamorphic Rock ------ Original Rock is Granite (Igneous Rock) so answer is Igneous Metamorphic.

Dhaval said: (Aug 21, 2017)  
Granite is not igneous rock. It is polymineralic rock @Vinoth.

Pradeep Chauhan said: (Oct 18, 2017)  
Gneiss is a metamorphic rock which obtained form conversion of granite, therefore, I think metamorphic rock is the correct answer.

Ram Poudel said: (Oct 25, 2017)  
Answer should be A.

Kuldeep Singh said: (Nov 15, 2017)  
That is metamorphic rock and formed by granite.

Hari said: (Nov 22, 2017)  
Gneiss is a high-grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.

Saurabh Chaurasia said: (Dec 4, 2017)  
No, the Right answer is A.

Budh Priya Maurya said: (Dec 23, 2017)  
Yes, the right answer is OPTION A.

Sanjeev Kumar said: (Jan 11, 2018)  
The right answer is (A).

Santanu Acharya said: (Jan 18, 2018)  
Genesis is obtained from granite...A is correct

Prasenjit said: (Feb 23, 2018)  
Gneiss is the metamorphic form of Granite.

Nil said: (Jul 26, 2018)  
Gneiss is obtained from Igneous rock Granite which undergoes the process of metamorphosis. So it can written as Gneiss is obtained from Igneous Metamorphic Rock. Here the answer will be A.

Manish Thakur said: (Aug 1, 2018)  
Gneiss is obtained from Granite (Igneous rock) because of metamorphism.

So, A is correct. More suitable answer could be Igneous Metamorphic Rock.

Dolly said: (Aug 15, 2018)  
D is the correct one as it settles after it's a metamorphic action.

Gopika said: (Sep 19, 2018)  
Gniess is a metamorphic rock. And it is obtained from granite, which is igneous plutonic rock. So I think option A gives the correct answer.

Bishu said: (Sep 29, 2018)  
The correct Answer is A.

Aashish said: (Jan 3, 2019)  
According to me, the Right answer is A.

Kavin Suriya said: (Jan 17, 2019)  
Gniess is a metamorphic rock and sedimented afterwards.

Santosh Kumar said: (Jan 23, 2019)  
Gneiss and quartz is siliceous rock.

Ajay Raj said: (Jan 30, 2019)  
Gneiss is a metamorphic rock. Gneiss is formed by high temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. Orthogneiss is gneiss derived from igneous rock (such as granite). Paragneiss is gneiss derived from sedimentary rock (such as sandstone).

So, the Answer is: metamorphic.

Farhan Malik said: (May 15, 2019)  
Gneiss is a common and widely distributed type of metamorphic rock. Gneiss is formed by high temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. Orthogneiss is gneiss derived from igneous rock (such as granite).

Bishnu Khadka said: (May 27, 2019)  
I think answer should be A. Gneiss is made from Granite.

Kammar Bahadur Bam said: (May 28, 2019)  
Genesis is obtained from granite. So, A is correct.

Poorna said: (Jun 15, 2019)  
Gneiss is metamorphic rock. How come a metamorphic rock obtained from metamorphic rock only?

Gneiss is absolutely metamorphic rock obtained from granite which is an igneous rock. Gneiss sometimes also has its parent rock as shale which is a sedimentary rock. So the answer must be igneous -sedimentary rock or simply igneous rock.

Prakash said: (Jan 16, 2020)  
Igneous rock gets converted into Gneiss by metamorphic action.

Nilesh Ghidode said: (Feb 17, 2020)  
Igneous rock occurring in both sedimentary rock and igneous rock hence its metamorphic form of either called sedimentary metamorphic or igneous metamorphic.

Mohanraj Joshi said: (Mar 10, 2020)  
It should be a metamorphic rock.

Angira said: (Apr 9, 2020)  
Granite is converted into Gneiss by metamorphic action.

Dinesh Khatri said: (May 5, 2020)  
It is also obtained from Conglomerate. So answer is D.

Suman said: (May 11, 2020)  
Shale (S) >Slate (M) >Phyllite (M) >Schist (M) >Gneiss (M).

So Granite is obtained from sedimentary-metamorphic rocks!

Hardik said: (Jun 13, 2020)  
Gneiss is obtained from granite (igneous rock) by metamorphic process. So the answer must be A.

Damodar said: (Dec 3, 2020)  
Option A is the correct answer.

Khim Khatri said: (Jan 8, 2021)  
Granite changes to gneiss so option may be A again it can be obtained from conglomerate which is sedimentary rock so option may be C ie both from igneous and metamorphic.

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