3. Spit is a long narrow ridges of sand and shingle which
is projected into the sea from coastline
http://worldlywise.pbworks.com/w/page/15409212/Unit%201%20Section%20A%20-
%20How%20physical%20processes%20have%20created%20coastal%20landforms
4. Longshore drift transports material along the coastline
Spits formed in shallow and sheltered water when
there is a change in the direction of the coastline
Deposition occurs resulting in the accumulation of
sand and shingle
The material initially deposited is the largest
material, dropped due to the reduction in energy
5. Finer material is then deposited, helping to build up
the rest of the spit
As spit grow outwards, a change in wind direction may
result in a change in the direction of the spit forming a
curved end (recurved laterals)
If growing across a river estuary, the length of the spit
will be restricted
A salt marsh may form in the sheltered, low energy
zone behind the spit.
7. a ridge of sand and shingle joining the mainland to an
island
http://80.59.24.98/Joomla/index.php/geog-historia/prof-d-marcelino-urresti/88-tema-1o-relieve-
costero
8. Tombolo's are created through the process of
longshore drift
A tombolo is formed where the spit continues to
grow until it reaches an island, forming a link with
the mainland, just like bridges
10. a ridge of sand and shingle which has joined two
headlands, cutting off a bay
http://www.3plains.com/uploads/image/wallpapers/ocean-wallpaper-2.jpg
11. (a) a spit grows the whole way across a bay
(b) a sandbank devlops offshore, parallel to the
shore, and is moved towards the coastline by the
waves and wind until it joins the mainland
Behind the bar, a lagoon is created, where water has
been trapped and the lagoon may gradually be infilled
as a salt marsh
Over time the lagoon will become infilled by
deposition
13. Features Spits
Summary
Tombolos Bars
What is it? a ridge of sand and a ridge of sand and
a ridge of sand and
shingle projecting shingle joining the
shingle which has
from the mainland mainland to an joined two
into the sea island headlands, cutting
off a bay
How does it form? when there is a formed when spit (a)form when a
break in the continue to grow spit grows the
coastline and drop outwards whole way across a
in energy, long- connecting the bay
shore drift mainland to the (b) a sandbank
deposited the offshore island just develops offshore,
material and build like bridges parallel to the
up spit shore until it joins
the mainland
Example Hurst Castle Spit Isle of Portland Slapton Sands
