A. Slate
B. Gneiss
C. Schist
D. Shale
E. Phyllite
Choose the correct answer from the options given below :
Metamorphic Rock Grading Explained
Metamorphic rocks form when existing rocks change due to heat, pressure, or chemical reactions. Metamorphic grade indicates the intensity of these changes. Understanding this sequence is key for classification.
Rock Types and Metamorphic Grade Sequence
The rocks provided can be ordered based on their formation conditions, from low to high metamorphic grade:
- Shale (D): This is a sedimentary rock, the protolith (original rock) that undergoes metamorphism. It represents the lowest grade.
- Slate (A): Forms from shale under low-grade metamorphism. It's characterized by fine-grained texture and slaty cleavage.
- Phyllite (E): Represents an intermediate-grade metamorphism, evolving from slate. It has a characteristic silky sheen due to aligned mica crystals.
- Schist (C): Forms under medium- to high-grade conditions. Exhibits schistosity, where platy minerals (like micas) are visibly aligned.
- Gneiss (B): Represents high-grade metamorphism. Typically shows distinct compositional banding (gneissic banding).
Ordering Rocks: High to Low Grade
Arranging the given rock types from the highest metamorphic grade to the lowest:
- Gneiss (B) - High Grade
- Schist (C) - Medium to High Grade
- Phyllite (E) - Medium Grade
- Slate (A) - Low Grade
- Shale (D) - Protolith (Lowest Grade)
Therefore, the correct sequence from high grade to low grade is B, C, E, A, D.
Similar Questions
- Consider the Earth to be a blackbody with an average temperature of $15^\circ\text{C}$. Find out the wavelength ($\lambda_{max}$) at which maximum power is radiated :
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Under adiabatic conditions, a moist air parcel cools slowly and rises to greater height in atmosphere compared to a dry air parcel.
Reason (R) : Compared to dry air parcel, latent heat of condensation released within the moist air parcel reduces rate of cooling of the moist air parcel moving up under adiabatic conditions.
In the light of the above statements, choose the most appropriate answer from the options given below : - Arrange the following elements on increasing order of their mass (weight) percentage in the Bulk earth :
A. Iron
B. Silicon
C. Oxygen
D. Magnesium
E. Nickel
Choose the correct answer from the options given below : - Arrange the following Epochs of Cenozoic era starting from recent one to older one :
A. Paleocene
B. Pliocene
C. Oligocene
D. Holocene
E. Eocene
Choose the correct answer from the options given below : - Arrange the following Seismic discontinuities based on their depth of occurrence from shallow to deeper :
A. Conrad discontinuity
B. Repetti discontinuity
C. Gutenberg discontinuity
D. Lehman discontinuity
E. Mohorovicic discontinuity
Choose the correct answer from the options given below : - Match List - I with List - II.
List - I (Decomposition Processes) List - II (Function) A. Leaching I. Degradation of humus by microbes to release inorganic nutrients B. Catabolism II. Accumulation of a colloidal dark coloured amorphous substance, which is a reservoir of nutrients C. Humification III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances D. Mineralization IV. Water soluble inorganic nutrients go down into the soil and get precipitated
Choose the correct answer from the options given below : - Choose the correct statements :
A. Both hardness and Alkalinity are measured in units of mg/L as $\text{CaCO}_3$
B. Enrichment of C and S are responsible for eutrophication of lakes
C. Alkalinity is a base neutralizing capacity
D. Dissolved ions increases salinity of water
E. Turbidity is a measure of transparency of water
Choose the most appropriate answer from the options given below : - Arrange the following materials in decreasing order of their porosity (percentage of total volume of material that consists of pore spaces) :
A. Sand
B. Clay
C. Gravel
D. Sandstone (Semi consolidated)
Choose the correct answer from the options given below : - Which of the following are examples of Igneous rocks ?
A. Batholiths
B. Stock
C. Argillacous
D. Gneiss
E. Zeolite
Choose the correct answer from the options given below : - Arrange the following gases in increasing order of their abundance in ambient atmosphere :
A. Kr
B. Ar
C. $\text{CO}_2$
D. He
E. Ne
Choose the correct answer from the options given below :
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
