What is it called when land that has soil carried down stream by a river and deposited at the river's mouth is called a what?
Flowing water has the capacity to pick up soil and move it. Small streams flow into larger streams, carry soil with them. Larger streams flow into rivers which flow into larger rivers, and eventually these rivers reach the sea. Large amounts of soil are deposited in river deltas, which are more or less triangular shaped regions where rivers run into the sea. Meanwhile, soil is continually lost from the upstream regions.
Land area that includes soil carried downstream by a river and deposited at the rivers mouth is called a what?
Alluvial soil is the debris/talus from weathering/erosion of mountain rocks. If the mountain rock is granite, the alluvial is the breakdown components of it which are clay, silicon and mica sand. This so called alluvial soil will be deposited around foothills and perhaps further down if acted by river system. My take on this one : ....By the same token the mountain soil should be the "in situ" weathered/eroded mountain rocks which have not been…