An alluvial fan a fan-shaped mass of sediment deposited at the base of a mountain front due to an abrupt change in stream gradient is another name for a small delta forming along a beach a plant that grows in deltas and is diagnostic of a delta a fan-shaped sediment mass generated by a distributary channel

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.