Material deposited by a river or stream is called:

Correct answer: Alluvium. Alluvium is the soil and sediment deposited by rivers and streams, especially on floodplains.

Background: Alluvial plains such as the Indus plain are very fertile.

• Sediment: Sediment is a general term for any settled material.
• Loess: Loess is wind-blown silt.
• Colluvium: Colluvium is material that collects at the foot of a slope by gravity.

Did you know? The word comes from the Latin alluere, “to wash against”.

Memory trick: Alluvium = river-laid.