Associated wetlands and river deltas are features that have developed in association with other shoreline features, such as streams, lakes, or marine shorelines.
Deltas
Deltas, like the Nooksack River delta, are landforms that are created at the mouth of a river or stream where it enters a larger, slower moving body of water. As water from rivers or streams enter a marine waterbody, the velocity of streamflow decreases and the stream loses capacity to carry most of the sediments and debris that were being transported in the stream load. These sediments then settle out and create a delta deposit at the mouth of the river or stream.