Question:
The name of an igneous rock having a modal composition of 55% olivine, 40% orthopyroxene and 5% plagioclase, as per the IUGS classification scheme, is
The name of an igneous rock having a modal composition of 55% olivine, 40% orthopyroxene and 5% plagioclase, as per the IUGS classification scheme, is
Updated On: Dec 13, 2025
- gabbro
- $β^+ (positron) decay
- lherzolite
- harzburgite
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
According to the IUGS classification of igneous rocks, harzburgite is characterized by a composition dominated by olivine and orthopyroxene. The given rock composition, with 55% olivine, 40% orthopyroxene, and 5% plagioclase, fits the definition of harzburgite.
Was this answer helpful?
1
0
Top IIT JAM GG Geology Questions
- The mineral assemblage found in a granulite facies metabasalt is
- Glossopteris is found in which of the following formations?
- In a sequence of undeformed sedimentary rocks, younger rocks overlie older rocks. This conforms to the principle of
- Dropstones are found in
- The sedimentary structure formed by unidirectional current is
View More Questions
Top IIT JAM GG Petrology Questions
- The mineral assemblage found in a granulite facies metabasalt is
- Dropstones are found in
- The sedimentary structure formed by unidirectional current is
- Match the sedimentary features/structures in Group I with the corresponding processes in Group II.
Group I Group II P. Stylolite 1. Liquefaction Q. Pseudonodule 2. Diagenesis R. Current crescent 3. Organo-sedimentary binding S. Stromatolite 4. Scouring - Which one of the metamorphic facies sequence in order of increasing metamorphic grade defines thermal metamorphism ?
View More Questions
Top IIT JAM GG Questions
- The mineral assemblage found in a granulite facies metabasalt is
- Glossopteris is found in which of the following formations?
- In a sequence of undeformed sedimentary rocks, younger rocks overlie older rocks. This conforms to the principle of
- Dropstones are found in
- The sedimentary structure formed by unidirectional current is
View More Questions