UPSC CSE Prelims
Question 92
The black cotton soil of India has been formed due to the weathering of
View correct answer and explanation
Correct answer: B
Correct Option: B (fissure volcanic rock)
Explanation: Black cotton (regur) soils are formed largely by weathering of basaltic Deccan Trap lava flows, which are fissure-volcanic rocks.
Option-wise Analysis:
A. Incorrect-Brown forest soil is a soil class, not the parent lava rock.
B. Correct-basalt from fissure eruptions weathers into black regur soil.
C. Incorrect-Granite and schist produce different soil associations.
D. Incorrect-Shale/limestone can form clayey soils, but are not the principal Deccan regur parent rock.