Question

how are limestone caves formed

Answer 1

Caves are formed by the dissolution of limestone. Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.

Answer 2

Limestone caves are formed because of the reaction between acid and other chemical substance to form an insoluble salt called calcium carbonate

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