introduction to oceanography.

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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