Geomorphology – Tectonic/Structural Valleys in the Himalayas Identify the most notable example of a tectonic (structural) intermontane valley among the following options.

Introduction / Context:
Intermontane valleys in the Himalayan region are often of tectonic/structural origin, formed by downwarping, faulting, or synclinal structures. Recognizing famous examples helps link structural geology to regional geography. This question asks you to single out the most notable tectonic valley from familiar names.

Given Data / Assumptions:

• Kashmir Valley: a large, renowned intermontane basin nestled between the Pir Panjal and the Greater Himalaya.
• Doon Valley: a smaller structural depression between the Siwalik and Lesser Himalaya near Dehradun.
• Aksai Chin: a high-altitude plateau (cold desert), not classically a tectonic valley.

Concept / Approach:
While both Kashmir and Doon valleys have structural components, the Kashmir Valley is widely cited as the most notable tectonic intermontane valley in the northwestern Himalaya due to its extent, geomorphic expression, and sedimentary fill history. The Doon Valley is significant but less expansive; Aksai Chin is best described as an elevated plateau rather than a valley.

Step-by-Step Solution:

Verification / Alternative check:
Regional geology references describe the Kashmir basin as a prominent tectonic depression with thick Quaternary deposits (Karewas), underscoring its intermontane structural character.

Why Other Options Are Wrong:

• Doon valley: Structural, yes, but not the most notable compared to Kashmir in scale and fame.
• Plains of Aksai Chin: Plateau/planar terrain; not a valley.
• None of the above: Incorrect because one option is clearly suitable.

Common Pitfalls:
Equating any intermontane depression with a “valley” without considering scale and classic examples. The question’s “most notable” phrasing points to Kashmir Valley.

Final Answer:
Kashmir valley