Change set
Pick exam & year, then Go.
Question map
Not attempted
Correct
Incorrect
★
Bookmarked
Loading…
Q97
(CAPF/2019)
Geography › World Physical Geography › Weathering and erosion
Answer Verified
The gently sloping accumulation of coarse alluvium deposits by a braided stream is known as
Result
Your answer:
—
·
Correct:
B
Explanation
The correct answer is Option B: alluvial fan.
In geomorphology, an alluvial fan is a cone-shaped or fan-shaped deposit of sediment formed where a stream leaves a mountain range and flows into a flatter plain. This change in gradient causes the stream to lose energy and deposit its load.
- Key Characteristics: The deposits typically consist of coarse alluvium (sand and gravel). The landform is described as a gently sloping accumulation.
- Association with Braided Streams: The streams flowing across alluvial fans are almost always braided (consisting of multiple interconnecting channels) due to the high sediment supply and variable discharge.
Why other options are incorrect:
- Sand bar (Option A): A sand bar (or braid bar) is a temporary ridge of sediment within a river channel. While braided streams contain sand bars, the term "gently sloping accumulation" refers to the broader landform (the fan) created by the stream, not the bars inside it.
- Bajada (Option C): A bajada is a continuous apron of sediment formed by the merging of multiple adjacent alluvial fans.
- Diaras (Option D): This is a regional term used in India for flood-prone islands or land located between river channels.
How others answered
Each bar shows the % of students who chose that option.
Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
68%
got it right
✓ Thank you! We'll review this.