Why can a surface stream suddenly disappear in a karst region?
Answer and explanation
Correct answer: Water enters underground cracks through a swallow hole
The governing concept is karst drainage, which develops where soluble rocks such as limestone contain joints, caves, and enlarged underground channels. A surface stream can enter a swallow hole, also called a ponor, and continue below ground instead of flowing across the surface. Thus option A is correct. Sea waves, glaciers, and wind do not normally explain the sudden disappearance of a stream in a karst landscape.
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What is the correct answer to this question?
Water enters underground cracks through a swallow hole
Why is this the correct answer?
The governing concept is karst drainage, which develops where soluble rocks such as limestone contain joints, caves, and enlarged underground channels. A surface stream can enter a swallow hole, also called a ponor, and continue below ground instead of flowing across the surface. Thus option A is correct. Sea waves, glaciers, and wind do not normally explain the sudden disappearance of a stream in a karst landscape.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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