Formation of Spits and Bars

SAND SPIT:

• When there is a bend in the coastline, longshore drift carries the sand beyond the bend. It builds up as a sand spit.
• Behind the spit , the sheltered water becomes a salt marsh.
• The end of the spit is curved where it meets strong winds and waves.

BARS:

• If longshore drift continues to extend the length of the spit , it may join up with the coastline on the other side of the opening, such as a bay.
• This results in the formation of a 'bar' with a 'lagoon' behind.
• The bar and lagoon at Slapton, Devon were formed when sea level was rising.