This range is composed of poorly consolidated, coarse sediments that quickly absorb rainfall.

The coarse sediments like gravel and sand are deposited first, close to the entrance of the river into the plain.

On top of the clay sediments are coarser sediments.

The first, decantation, works best with coarse sediments.

The structure very rarely occurs in coarser sediments.

Pockets of oil have remained in coarse shorefront sediments, where they have continued to affect other life, the study said.

The port's breakwater starves the barrier of coarse sediments from the rivers to the south.

However, after the breakwater was built the coarse sediment is unable to reach the barrier as it accumulates at the port's southern side.

The ratio of fine to coarse sediments making up the barrier is also increased.

The coarse sediments, gravel, and sand, generated and moved by rivers are extensively used in construction.