Alluvial fan
delta
DELTA
A+ Alluviain fans
A+ Alluviain fans
Alluvial fan
A delta forms when the sediment from one area is brought to another area by a river after being eroded. The river will deposit the sediment at the mouth of the river, forming the delta.
An alluvial fan starts at just a build up of sediment at the mouth of a river. As the current moves, more and more sediment is lifted into the stream and carried until it hits a sediment deposit. As the sediment deposit gets bigger, it is exposed to the air and forms a sediment mountain. As the mountain gets bigger it forms an island in the middle of the mouth of a river. This is called an alluvial fan! Hope this was helpful!
an older river deposits more sediment.
Sediment.
A sea or ocean is found at the mouth of a river.
I believe that is from BC Science 7 and the answer is a delta.
silt This trianguar deposit of sediment where a river empties into an ocean is called a delta.