Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Chronostratigraphy is concerned with the mutual time relationship of strata. Reason (R) : Formation, member and bed are units of chronostratigraphy. In the light of the above statements, choose the most appropriate answer from the options given below :
Assertion (A) Analysis: Chronostratigraphy and Time Relations
Assertion (A) states that Chronostratigraphy is concerned with the mutual time relationship of strata. This is correct. Chronostratigraphy establishes time-rock units and sequences, defining the geologic time span during which specific rock strata were deposited.
Reason (R) Analysis: Stratigraphic Units
Reason (R) claims that formation, member, and bed are units of chronostratigraphy. This is incorrect.
- Formation, member, and bed are fundamental units of lithostratigraphy. They are defined based on observable physical rock (lithologic) characteristics.
- Chronostratigraphic units, in contrast, are based on geologic time. Examples include Eonothems, Erathems, Systems, Series, and Stages, which represent the rocks deposited during specific geologic time units (Eons, Eras, Periods, Epochs, Ages).
Therefore, while Assertion (A) accurately describes chronostratigraphy, Reason (R) incorrectly identifies lithostratigraphic units as chronostratigraphic units.
Conclusion
Based on the analysis, Assertion (A) is correct, and Reason (R) is incorrect. This aligns with option 3.
Similar Questions
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Gypsum has lower density than anhydrite.
Reason (R) : Hydrated minerals tend to expand many times the original volume of the anhydrous minerals.
In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Drumlins show features opposite to those of Roches Moutonnees.
Reason (R) : The stoss side is steep and the lee side is roughened.
In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : In a hand specimen quartz can be easily distinguished from orthoclase.
Reason (R) : Orthoclase has lower refractive index than quartz.
In the light of the above statements, choose the most appropriate answer from the options given below :
Match List - I with List - II.
List - I
Mineral PropertyList - II
Type of lightA. Cleavage I. Plane polarized B. Twinkling II. Ordinary C. Twinning III. Crossed nicols D. Disperson IV. Convergent Choose the correct answer from the options given below :
Match List - I with List - II.
List - I
Optical featureList - II
Optical diagramA. Wave front (isotropic) I. Ellipse B. Wave surface (isotropic) II. Sphere C. Wave front (anisotropic) III. ellipsoidal D. Wave surface (anisotropic) IV. circle Choose the correct answer from the options given below :
- A solid crystal in which a face on one side is opposite to a point on the other, is called :
- Which of the following pairs do not have the same number of classes in their crystal system ?
- The relative abundance of a particular face of a crystal is a function of :
- In case of dipping beds, progressively younger beds occur along the directions of dip if :
- On level surface, elliptical outcrops are commonly exhibited by :
Important Questions from Mixed Topic (CUET PG)
- Kalpsutra, the illustrated canonical text is from:-
- The Harappan city almost exclusively devoted to craft production was-:
- Mohandas Karamchand Gandhi launched quit India movement after the failure of:-
- The "Objectives Resolution" was introduced in constituent assembly by:-
- Who among the following was not a member of the constituent assembly:-
