An alluvial plain, sometimes also referred to as a fluvial plain.
delta
Gold found in river sediment is referred to as an alluvial deposit.
Alluvial silt is commonly found in river valleys, floodplains, and deltas where rivers deposit sediment as they flow downstream. It can also be found in coastal areas where sediment is transported by ocean currents and tides.
The thickest sedimentary deposits are typically found in basins and troughs where large amounts of sediment have accumulated over millions of years. These areas can include deep ocean basins, continental rift zones, and areas where rivers deposit sediment such as deltas. The sediment can accumulate to great thickness due to tectonic activity, climate changes, or the presence of large amounts of sediment sources.
Fossils and sediment
It is found in faeces
Lithogenous sediment is the most common neritic deposit because it is primarily derived from the erosion and weathering of rocks on land. These sediments are transported to the ocean by rivers and wind, accumulating in shallow continental shelf areas where neritic deposits are found. This continuous process of erosion and transportation ensures a steady supply of lithogenous sediment to neritic environments.
Moraines are mostly found in regions that have experienced glacial activity, such as polar regions, mountainous areas, and high latitudes. They are typically located at the edges or in the paths of glaciers where they deposit sediment and rocks as the glacier moves.
Alluvial fans usually created as flowing water interact with mountains. It is a triangle-shaped deposit of sand, gravel and smaller pieces of sediment. There is also a type of alluvial fan that can be found underwater which is the subaqueous fan.
An alluvial fan is a structure created mostly by deposition. It forms when sediment carried by a river is deposited as the river's flow velocity decreases, resulting in a fan-shaped deposit of sediment. Alluvial fans are commonly found at the base of mountains or hills.
Depends on the environment and mode of deposition. I think that you're thinking of an alluvial fan.
A sea or ocean is found at the mouth of a river.