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प्रश्न
Explain the evolution of valley sinks or uvalas.
टीपा लिहा
उत्तर
Quite often the surface run-off simply goes down swallow and sinkholes and flows as underground streams and reemerge at a distance downstream through a cave opening. When sinkholes and dolines join together because of slumping of materials along their margins or due to roof collapse of caves, long, narrow to wide trenches called valley sinks or uvalas form.
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Landforms and their Evolution - Exercises [पृष्ठ ७०]
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