Before revision: Lena river delta A river delta is a landform shaped like a triangle, created by the deposition of sediment that is carried by a river and enters slower-moving or stagnant water.Miall, A. D. 1979.
After revision: Satellite image of the Amazon Delta captured by NASA in 2005.NASA satellite photograph of the Nile Delta (shown in false color)Lena river delta A river delta is a landform shaped like a triangle, created by the deposition of sediment that is carried by a river and enters slower-moving or stagnant water.Miall, A. D. 1979.