The document describes several large-scale coastal landforms that form through depositional processes, including sand spits, bay mouth bars, barriers islands, lagoons, sea islands, deltas, and drumlins/moraines. Sand spits form where longshore currents slow and curl offshore, depositing sand and gravel. Bay mouth bars are sand spits that are attached to headlands and protect adjacent bays. Barrier islands form from sediment accumulating on submerged rises and migrate inland as sea levels rise. Lagoons are bodies of water separated from the ocean by barrier islands or reefs. Deltas form at river mouths where sediment is deposited, taking different shapes based on river flow, tides, or wave dominance

1. LARGE- SCALE FEATURES
ACCUMULATE ON
DEPOSITIONAL COAST.

2. Sand spit
 deposition landform found off coast.
 spits grow, salt marsh develop as water being sheltered.
 Form where longshore current slow.
 Slow current  deposition of sand and gravel at
downcurrent of headland.
 Curled  cause by wave refraction.
Spurn point

3. Bay mouth bar
 sand spit attach to headland.
 adjacent to bay.
 protect the bay.
Inlet
 Narrow body of water.
 At sea coast connection between bay and ocean.
Bay mouth bar

4. Beach and baymouth bar at
the mouth of the Russian
River at Jenner

5. Barrier island
 Sand bar exposed and parallel to shoreline.
 Sediment accumulate on submerged rise.
 develop most easily on wave dominated coasts with a
small to moderate tidal range.
 Migrate toward land as sea level rise.
 Severe storm generate intense waves  erode barrier
island.

6. Lagoon
 Long, shallow body of water separated from
large body of water.
 Isolated from ocean by barrier island or reefs.
 Become island  high land of coastal dunes.
 Sea level increase  island & lagoon increase
toward land.
Garabogaz – Gol
lagoon in
Turkmenistan

7. Sea island
 Firm central core.
 Part of mainland when sea level decrease.
 Sea level increase  surround with beach.
 Tombolo  sediment accumulate from bridge between
sea island and mainland.
Kelambu beach,
Kudat Sabah

8. Drumlin and moraines
 Form by melting glacier.
The Bride Hills (terminal
moraine), Europe.

9. Deltas
 Deposition of sediment found at river mouth.
 Broad continental shelf present  as a platform
 Condition :
-river transporting a large amount of sediment.
-sea have a small tidal range and weak currents.
-shallow at the river mouth.
 Shape represent balance between erosion and deposition.

10. TYPE OF DELTA
River-dominated Wave- dominated
Strong flow of fresh Smaller than river
Tide-dominated
water and continental dominated and tide
Tidal current more
sediment. dominated.
strong than fresh water.
Protect marginal Sooth shoreline.
Sediment form long
seas. Have one main exit
island parallel to water
Well develop of channel.
flow.
distribution cause split
end of river.

11. -THE END-
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