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Geomorphic Processes

Question
CBSEENGE11010527

Describe the contribution of animals in biological weathering.

Solution
The break down of rocks and minerals by plants, animals and as bacteria as well is called biological weathering.
(i) The main contribution by animals to weathering seems to be repeated missing of soil material thus bringing fresh material into exposure to weathering agents.
(ii) Snails are common in limestone rich areas and make deep holes in limestone. Bird droppings may provide organic matter for the start of soil formation and weathering.
(iii) Grazing by large animals uncovers the soil thus increasing surface run-off and soil-erosion.