The Indus alluvial plains of Pakistan originate from ___________ parent sediments transported downstream by the Indus River network from the Himalayas:
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Answer: D. None of the above
Explanation
Indus alluvial plains consist of sediments deposited by flowing river water networks. Himalayan weathering products travel downstream through river channels to form vast floodplains. Fluvial deposition processes created the fertile agricultural soils found across Pakistan. Alluvial sediments are transported and deposited by active river systems over millennia. Glacial till and moraines are deposited directly by melting ice sheets rather than rivers. Colluvial deposits accumulate at the base of slopes due to gravity rather than fluvial transport.
The Indus basin represents one of the largest and most productive irrigation zones globally. Deep alluvial parent materials provide excellent physical conditions for agricultural root growth. River sedimentation continuously replenishes mineral nutrients in traditional floodplains. Till refers to unsorted glacial deposits left behind directly by melting ice sheets. Moraine describes glacial ridges formed from rock debris transported by glaciers. None of the above is correct because fluvial alluvium formed the Indus plains.
- Subject
- Agriculture
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- Agriculture
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- Difficulty
- medium
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