what is a transgressive dune
Transgressive Dunefields. Transgressive dunes are also known as mobile or migratory dunes, and sand drifts. Transgressive dunefields will are generally located where wave energy is high and sand supply is or was moderate to high, or where significant coastal erosion has occurred.hese are the newly developing dunes, initiated by wind blown sand being trapped by vegetation and other obstructing matter such as driftwood. This is the area where sand-binders such as pikao thrive as they are well adapted to this highly variable environment.