Spits Bars Tombolos
A spit is a narrow A bar is a narrow A tombolo is a
ridge of sand or ridge of sand or narrow ridge of
shingle.One end shingle which seals sand or shingle
juts out into the off the mouth of which joins an
sea,while the a bay. offshore island
other is connected A spit may grow in to the
to the land. length until it mainland.
Longshore drift stops completely seals A spit may
when it reaches a off a bay.The grow in length
bay or other sheltered former spit is then until its
place.The material referred to as a seaward end
carried by the bar.A lagoon is reaches a
longshore drift is a small lake nearby isalnd.
deposited at these formed behind The former spit
places and may the bar.It was is then referred
build up gradually originally part of to as a
to form a spit. the bay,which was tombolo.
sealed off by the
bar.
Examples: Examples: Examples:
Portmarnock, Lady's Island Lake, Howth,Co.Dublin. Co.Wexford. Co.Dublin,was
Bannow Bay, Loch Muiri, once an island
Co.Wexford. Co.Clare. until the Sutton
tombolo joined
it to the
mainland.