通常认为海底扇的发育出现于低海面时期。在陆生地体中 ,相对海平面的降低导致从河流和陆架向深海盆搬运的沉积物增加 ,从而促使扇体发育。在一般情况下 ,这是由于三角洲向陆架边缘迁移和陆坡不稳定的增强 ,在陆架上形成下切水道和峡谷 ,从而使河流梯度增加所致。在相对海平面 The development of the submarine fan is generally considered to have occurred during the low sea level. In terrestrial terrains, the relative sea-level reduction led to an increase in the sediment transported from the rivers and the shelf to the deep sea basin, thereby contributing to the development of the fan body. In general, this is due to the migration of the delta to the edge of the shelf and the instability of the slope, resulting in the formation of undercutters and valleys on the shelf, resulting in an increase in the gradient of the river. In relative sea level