Deltas - a. are made of sediment deposited near the mouth of a stream. b. form where a stream deposits sediment on a flat plain at the base of a mountain range. c. contain distributaries that flow into the trunk river. d. may sink below sea level if the river and its distributaries frequently flood the delta.
Geography · High School · Tue Nov 03 2020
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The correct answer is a. Deltas are made of sediment deposited near the mouth of a stream.
- When a river flows into a relatively still body of water like an ocean, sea, estuary, or lake, it loses energy and deposits the sediments it has carried from upstream.
- Over time, these sediments build up to create deltas, which often have a triangular shape when viewed from above, hence the name "delta" after the uppercase Greek letter Delta (Δ).