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.
Frequently asked questions
What is the correct answer to this question?
Widening of joints and cracks in limestone by solution
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Recording of Transactions (I & II). Topic: Covers the accounting equation.
