foreset

developmental stage of tabular foreset laminae;

板状前积纹层发育阶段;

From some field investigations (like Lake Constance and Lake Mead), the shape of a delta is not a Gilbert delta.Slope evolution between foreset and bottomset is not sharp but smooth.

摘:川流入湖泊或水库，若川的密度是高于湖泊，这川就会潜没入湖泊的底部形成异重流。