process, time, landforms and landscapes in coastal settings Flashcards
what factors have shaped the present coastal landscape features
-local tectonic processes
-sea level change
-climate change
-changing ocean currents
-natural disasters
-the changing nature of human activity
what are coastal sand dunes
accumulations of sand shaped into mounds by the wind
how is sand moved inland
through the process of saltation
what is the development of sand dunes
-sand becomes trapped by an obstacle(drift wood, seaweed)
-embryo dunes first develop which are suitable for colonisation by grasses (marram grass)help bind the sand together
-upward growth of embryo dunes called foredunes are initially yellow no organic matter
-as veg cover increases humus is added to the sand turn grey
- dune eventually becomes fixed more veg colonise
what are wildlife and human activity catalysts for
blowouts(sand removed)