Why is "Confusing spit, bar, and tombolo" a common mistake in Formation of Coastal Landforms - Part 2 ?

Why it happens: All three are depositional. How to avoid it: SPIT = attached at one end, sticks out. BAR = grows across a bay (lagoon behind). TOMBOLO = connects mainland to island. Sketch the difference. Source: 0460 Examiner Reports 2022-2024

Why is "Describing coastal landforms without a named example" a common mistake in Formation of Coastal Landforms - Part 2 ?

Why it happens: Generic feels safer. How to avoid it: Named examples (Spurn Head, Chesil Beach, Slapton Sands) earn extra marks and demonstrate real-world understanding.

Changing Coastal EnvironmentsCambridge IGCSE Geography (0460)

Formation of Coastal Landforms - Part 2

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Coastal Landforms Part 2 (Depositional) Study Notes — Cambridge IGCSE Geography 0460 (2024-2026 syllabus)

Beaches, spits, bars, tombolos. Sand dunes and salt marshes. How longshore drift and deposition build new land.

What you’ll learn

Mapped to the Cambridge IGCSE 0460 syllabus (2024-2026).

2.3.1 — Describe beach formation.
2.3.2 — Describe spit, bar, tombolo formation.
2.3.3 — Identify salt marsh and sand dune ecosystems.

Beach

Built by constructive waves; material sorted by size.

Beaches form where CONSTRUCTIVE waves deposit material:

Strong SWASH carries sand and shingle UP the beach.
Weak BACKWASH can't drag it back.
Net deposition accumulates over time.

Sorting. Material organised by size — LARGER PEBBLES at the storm beach (top), FINER SAND at the lower beach.

Beach profile. Gentle slope in low energy; steeper where pebble-dominated.

Cambridge tip. Mark scheme rewards: CONSTRUCTIVE waves, swash > backwash, sorting by size.

Constructive waves; strong swash, weak backwash.
Material sorted by size.
Pebbles at top, sand at bottom.

See the full worked example for formation of coastal landforms - part 2 →

Spit, bar, and tombolo

Longshore drift extends sediment out into sea.

Spit. Forms where the coastline CHANGES DIRECTION (e.g. at a river mouth or sharp bend). Longshore drift continues past the bend; deposition builds a linear ridge sticking out.

Wind from opposite direction (or wave refraction) curves the end → RECURVED end.
Sheltered water behind the spit → MUD ACCUMULATES → SALT MARSH.
Example: Spurn Head (UK), Sandy Hook (USA).

Bar. A spit that grows ACROSS a bay, joining two headlands. Cuts off a body of sea → LAGOON.

Example: Slapton Sands (UK).

Tombolo. A spit connecting the mainland to an offshore ISLAND. Sediment deposited where wave refraction from both sides meets and slows.

Example: Chesil Beach to Isle of Portland (UK).

Cambridge tip. Always name examples. Diagrams help — show prevailing wind, longshore drift arrows, recurved end.

Spit: linear, attached one end, recurved.
Bar: across a bay → lagoon.
Tombolo: mainland to island.

See the full worked example for formation of coastal landforms - part 2 →

Salt marsh and sand dunes

Specialist ecosystems on sheltered or windblown coasts.

Salt marsh. Forms in SHELTERED water behind spits or in estuaries. Fine mud accumulates; pioneer plants (cordgrass) trap more sediment. Develops into rich ecosystem with bird, fish, invertebrate life. Threatened by sea-level rise and 'coastal squeeze'.

Sand dunes. Form where windblown sand accumulates above the high-tide line. Pioneer plants (marram grass) stabilise the dune; over years, develop into complex ecosystems. Important for coastal protection — absorb storm energy.

Cambridge tip. Both ecosystems are NATURAL flood defences. Mark scheme rewards mentioning their role in soft coastal engineering.

Salt marsh: sheltered, muddy, bird-rich.
Sand dunes: windblown sand, stabilised by marram grass.
Both protect coasts and host biodiversity.

See the full worked example for formation of coastal landforms - part 2 →

How it’s examined

Depositional landforms appear on most Paper 1s. Most-tested: beach formation (5 marks), spit formation with diagram (8 marks), distinguish spit/bar/tombolo (6 marks).

Sources: Cambridge IGCSE Geography 0460 syllabus (2024-2026); 0460 Examiner Reports 2022-2024; 0460/12 May/Jun 2024 question paper and mark scheme. Last reviewed 2026-05-09.

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Step-by-step worked examples — Formation of Coastal Landforms - Part 2

Step-by-step solutions to past-paper-style questions on formation of coastal landforms - part 2 , written exactly the way a tutor would explain them at the board.

1Formation of a beach (5 marks)
Extended• Adapted from 0460/12 May/Jun 2024• beach
Question
Describe how a beach forms. (5 marks)
Step-by-step solution
1. Step 1
  Constructive waves (2 marks). Low, long-wavelength waves carry sand and shingle UP the beach via strong SWASH.
2. Step 2
  Weak backwash (2 marks). Backwash is too weak to remove all the material; sediment stays on the beach.
3. Step 3
  Sorting (1 mark). Material is sorted by size — larger pebbles at the top of the beach (storm beach), finer sand at the lower beach.
Answer
Constructive waves deposit sediment via strong swash + weak backwash; material sorted by size.
2Formation of a spit (8 marks)
Extended• spit
Question
Describe the formation of a spit. (8 marks)
Step-by-step solution
1. Step 1
  Longshore drift moves material (2 marks). Sediment is transported along the coast by longshore drift in the direction of prevailing wind.
2. Step 2
  Change of direction (2 marks). Where the coastline CHANGES DIRECTION (e.g. a river mouth or sharp bend), the moving sediment continues OUT into the sea past the headland.
3. Step 3
  Deposition (2 marks). Material is deposited in slower water (sheltered from waves). A LINEAR RIDGE of sand/shingle builds up, attached to the land at one end.
4. Step 4
  Curved end (2 marks). Wind from the OPPOSITE direction or wave refraction curves the end of the spit, creating a HOOK or RECURVED END. Sheltered waters behind the spit fill with mud — forming SALT MARSH.
Answer
Longshore drift → change in coastline direction → deposition → linear ridge → recurved end → salt marsh forms behind. Example: Spurn Head (UK).
Examiner tip
Mark scheme rewards diagrams showing prevailing wind, longshore drift arrows, and recurved end clearly.
3Bars and tombolos (6 marks)
Extended• bar, tombolo
Question
Distinguish a BAR from a TOMBOLO. Describe how each forms. (6 marks)
Step-by-step solution
1. Step 1
  Bar (3 marks). A SPIT that grows ACROSS a bay, connecting two headlands. Cuts off the bay from the sea, forming a LAGOON behind it. Example: Slapton Sands (UK).
2. Step 2
  Tombolo (3 marks). A SPIT that connects the MAINLAND to an ISLAND. Sediment deposited behind the island where waves refract around both sides meet and slow down. Example: Chesil Beach to Isle of Portland (UK).
Answer
Bar: spit across a bay → lagoon. Tombolo: spit connecting mainland to island.

Key Definitions and Keywords — Formation of Coastal Landforms - Part 2

Definitions to memorise and the exact keywords mark schemes credit for formation of coastal landforms - part 2 answers — sharpened from recent examiner reports for the 2026 0460 sitting.

Beach
Examiner keyword
Deposit of sand or shingle along the coast, formed by constructive wave deposition.
Spit
Examiner keyword
Long, narrow deposit of sand or shingle extending from the coast into the sea. Often recurved at the end.
Bar
Examiner keyword
A spit that grows across a bay, connecting two headlands and cutting off a lagoon.
Tombolo
Examiner keyword
A spit that connects the mainland to an offshore island.
Salt marsh
Examiner keyword
Sheltered, muddy area behind a spit or bar where fine sediment accumulates. Supports specialist plants.
Sand dune
A hill of windblown sand on a coast. Stabilised by marram grass and other vegetation.

Common Mistakes and Misconceptions — Formation of Coastal Landforms - Part 2

The traps other students keep falling into on formation of coastal landforms - part 2 questions — taken from recent Cambridge IGCSE 0460 examiner reports and mark schemes — and how to avoid them.

✕Confusing spit, bar, and tombolo
0460 Examiner Reports 2022-2024
Why it happens
All three are depositional.
How to avoid it
SPIT = attached at one end, sticks out. BAR = grows across a bay (lagoon behind). TOMBOLO = connects mainland to island. Sketch the difference.
✕Describing coastal landforms without a named example
Why it happens
Generic feels safer.
How to avoid it
Named examples (Spurn Head, Chesil Beach, Slapton Sands) earn extra marks and demonstrate real-world understanding.

Practice questions

Exam-style questions with step-by-step worked solutions. Try one before checking the method.

Past paper style quiz

Get a report showing which sub-topics you've nailed and which ones still need work.

Formation of Coastal Landforms - Part 2

Short Study Notes in the form of Slides

Detailed Study Notes

What you’ll learn

How it’s examined

1Formation of a beach (5 marks)

2Formation of a spit (8 marks)

3Bars and tombolos (6 marks)

Beach

Spit

Bar

Tombolo

Salt marsh

Sand dune

✕Confusing spit, bar, and tombolo

✕Describing coastal landforms without a named example

Practice questions

Past paper style quiz

Assess your understanding