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What mainly causes underground streams to develop in karst caves?

Answer and explanation

Correct answer: Widening of joints and cracks in limestone by solution

Karst drainage develops where soluble limestone contains joints, cracks and bedding planes. Carbonic-acid-rich rainwater enters these openings and dissolves the rock, gradually enlarging them into connected conduits. Water can then flow through the enlarged underground passages and form streams, caves and springs. Hence option A is correct. Delta retreat, coastal deposition and loess accumulation do not create underground limestone drainage.

Related tags

KarstCaveGroundwaterCovers The Accounting EquationRecording Of Transactions (I & Ii)Recording Of Transactions I IiAccountancyClass 11 Mcq

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