Continental Drift Theory: Wegener's Pangaea and the Evidence (Class 11 Geography, Fundamentals of Physical Geography, Chapter 4)
Updated 17 October 2026 · Fact-checked
Alfred Wegener proposed in 1912 that all continents formed one mass, Pangaea, which began to split about 200 million years ago into Laurasia and Gondwanaland. The evidence includes the jig-saw fit of coasts, rocks of the same age, tillite, placer gold in Ghana and fossils such as Mesosaurus. The weak point was the force he suggested.
Understand Continental Drift Theory: Wegener's Pangaea and the Evidence
Why this topic matters. A frequent Board question asks for evidence in support of continental drift.
1. Background. The symmetry of Atlantic coastlines suggested that the Americas, Europe and Africa were once joined. Abraham Ortelius (Dutch map maker) proposed this in 1596; Antonio Pellegrini drew a map with the continents together. Alfred Wegener, a German meteorologist, put forward the comprehensive continental drift theory in 1912.
2. The idea. All continents formed one mass, Pangaea ("all earth"), surrounded by the mega-ocean Panthalassa. About 200 million years ago Pangaea began to split into Laurasia (north) and Gondwanaland (south), which later broke into today's continents.
3. Forces. Wegener proposed the pole-fleeing force (earth's rotation makes it bulge at the equator) and the tidal force (attraction of the moon and sun). Most scholars found these inadequate, the weak link of the theory.
4. Evidence.
- Jig-saw fit. The facing shores of Africa and South America match. Bullard (1964) used a computer programme to match the Atlantic margins at the 1,000-fathom line; the fit was nearly perfect.
- Rocks of the same age. A belt of ancient rocks (2,000 million years) on the Brazil coast matches rocks of western Africa. The earliest marine deposits on both coasts are Jurassic, so the ocean did not exist before.
- Tillite. A sedimentary rock formed from glacial deposits. India's Gondwana system of sediments has counterparts in six southern landmasses; thick tillite at its base shows extensive, prolonged glaciation. It is evidence of palaeoclimates.
- Placer deposits. Rich placer gold occurs on the Ghana coast but there is no source rock; the gold-bearing veins are in Brazil, so the gold came from the Brazil plateau when the continents were side by side.
- Fossils. Identical species on either side of oceans. Lemurs in India, Madagascar and Africa led some to imagine "Lemuria". Mesosaurus, a small reptile of shallow brackish water, is found only in the Southern Cape province of South Africa and in Brazil, now 4,800 km apart.
5. After Wegener. After the Second World War, ocean floor discoveries added new dimensions. Arthur Holmes (1930s) proposed that radioactive elements cause thermal differences in the mantle that generate convection currents, an attempt to answer the problem of force.
Continental Drift Theory: Wegener's Pangaea and the Evidence: key facts
- Wegener's supercontinent
Pangaea all earth Panthalassa all water 200 million years ago split Laurasia north Gondwanaland south - Terms.
- Forces proposed
Pole-fleeing force earth's rotation, equatorial bulge Tidal force moon and sun Verdict inadequate - Weakness.
- Evidence
- Jig-saw fit at 1,000-fathom line (Bullard 1964)
- Rocks of the same age
- Tillite
- Placer gold of Ghana
- Fossils: Mesosaurus, lemurs
- Five proofs.
- Key figures
- Ortelius 1596
- Wegener 1912
- Holmes 1930s
- 4,800 km between Mesosaurus sites
- People and numbers.
How to answer Continental Drift Theory: Wegener's Pangaea and the Evidence questions
Drift answers are lists of evidence with a named example.
- 1Introduce Wegener and Pangaea.
- 2Give the split into Laurasia and Gondwanaland.
- 3List five proofs with an example for each.
- 4Mention the weakness: force.
- 5Add Holmes as the later answer.
Continental Drift Theory: Wegener's Pangaea and the Evidence in real life
The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.
Torn page
Suppose you find two halves of a torn page in different rooms and the edges fit perfectly, with the writing continuing across.
Which drift evidence is this like?
Try it first, then show the solutionSolution
- Matching coasts of Africa and South America.
- Matching rocks and fossils across the Atlantic.
Answer: It is like the jig-saw fit and matching rocks and fossils.
Memory hook: Edges that fit.
Gold without a mine
Suppose a river sandbar has gold dust but no gold-bearing rock nearby, while a distant region has such rock.
Which drift evidence does this resemble?
Try it first, then show the solutionSolution
- Placer gold on the Ghana coast has no source rock there.
- The source veins are in Brazil.
Answer: It resembles the placer deposits of Ghana whose source is in Brazil.
Memory hook: Gold travelled.
Tricks to remember Continental Drift Theory: Wegener's Pangaea and the Evidence
Short memory aids. Say each one aloud once, then use it on a question the same day.
1912
Wegener
Use it when: Year.
L over G
Laurasia north, Gondwanaland south
Use it when: Split.
J-R-T-P-F
Jig-saw, Rocks, Tillite, Placer, Fossils
Use it when: Evidence.
Continental Drift Theory: Wegener's Pangaea and the Evidence: solved examples
Ordered from board level to HOTS. Try each one before you open the solution.
Example 1: Pangaea · 1 mark · MCQBoard level
The name Pangaea means:
(A) all water
(B) all earth
(C) northern land
(D) southern land
Try it first, then show the solutionSolution
- Pangaea: all earth; Panthalassa: all water (1 mark).
Answer: (B)
Example 2: Wegener's forces · 3 marks · Short answerBoard level
Name two forces Wegener suggested and say why scholars rejected them. (3 marks)
Try it first, then show the solutionSolution
- Pole-fleeing force from earth's rotation (1 mark).
- Tidal force of moon and sun (1 mark).
- They were considered totally inadequate to move continents (1 mark).
Answer: Wegener suggested a pole-fleeing force linked to the earth's rotation and a tidal force due to the moon and sun. Most scholars found these totally inadequate to move continents.
Example 3: Tillite as evidence · 3 marks · Short answerHarder board level
Explain how tillite supports continental drift. (3 marks)
Try it first, then show the solutionSolution
- Tillite is rock formed from glacial deposits (1 mark).
- India's Gondwana system, with thick tillite at its base, has counterparts in six different southern landmasses (1 mark).
- This shows these lands shared a glaciated history and were together (1 mark).
Answer: Tillite is a sedimentary rock formed from glacial deposits. India's Gondwana system, with thick tillite at its base, has counterparts in six different southern landmasses, showing extensive, prolonged glaciation. Similar histories imply that the lands were once together, so tillite is evidence of palaeoclimates and drift.
Example 4: Which statement is not supported? · 1 mark · MCQHarder board level
Which of the following is NOT cited as evidence for continental drift?
(A) Tillite deposits of the Gondwana system in several southern landmasses
(B) Placer gold on the Ghana coast whose source lies in Brazil
(C) Identical Mesosaurus fossils on two continents now 4,800 km apart
(D) Seasonal changes in the length of day
Try it first, then show the solutionSolution
- (A), (B) and (C) are evidence; (D) has nothing to do with the movement of continents (1 mark).
Answer: (D)
Example 5: HOTS: how convincing was drift in 1912? · 5 marks · Long answerHOTS / competency
"Wegener's theory was correct in its evidence but incomplete in its explanation." Evaluate. (5 marks)
Try it first, then show the solutionSolution
- Evidence: fit, rocks of same age (1 mark).
- Evidence: tillite, placer gold, fossils (1 mark).
- Forces suggested were inadequate (1 mark).
- Holmes's convection currents tried to answer force (1 mark).
- Ocean floor studies after the Second World War completed the explanation (1 mark).
Answer: The coastal fit, rocks of the same age, tillite, Ghana's placer gold and Mesosaurus fossils all supported continents once being together. But the forces Wegener proposed, rotation and tides, were inadequate. Holmes proposed convection currents in the mantle, and after the Second World War ocean floor mapping gave new evidence which led to sea floor spreading and plate tectonics. So the evidence was strong but the mechanism was incomplete.
Where students lose marks in Continental Drift Theory: Wegener's Pangaea and the Evidence
The slips examiners see most often, and what to write instead.
Mistake: Dating Wegener to 1596
Ortelius is earlier.
Wrong working
Wegener proposed drift in 1596.
Right working
Ortelius 1596; Wegener 1912.
Do this: Name each with date.
Usually costs: 1 mark.
Mistake: Swapping Laurasia and Gondwanaland
Names similar.
Wrong working
Gondwanaland was the northern mass.
Right working
Laurasia north; Gondwanaland south.
Do this: Remember L = Lofty north.
Usually costs: 1 mark.
Mistake: Naming only one proof
Time pressure.
Wrong working
Evidence is the fit of continents.
Right working
Give at least three with an example each.
Do this: List five.
Usually costs: 2 marks.
Exam tips
- Always mention five types of evidence.
- Say "inadequate force" for Wegener's weakness.
- Mention Bullard 1964 for the fit.
Practice questions on Continental Drift Theory: Wegener's Pangaea and the Evidence
Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.
Q1 · 1 mark · MCQBoard level
Who proposed the convection current theory in the 1930s?
(A) Wegener
(B) Holmes
(C) Hess
(D) BullardHint
Radioactive elements.
Answer
(B) Holmes.
Q2 · 2 marks · Very short answerHarder board level
Mesosaurus fossils are found 4,800 km apart. If drift moved the continents at an average of 2.4 cm a year, estimate the years needed to cover 4,800 km (illustration). (2 marks)
Hint
Convert km to cm.
Answer
4,800 km = 480,000,000 cm; 480,000,000 / 2.4 = 200,000,000 years, comparable to the 200 million years since Pangaea began to split (a rough illustration).
Q3 · 2 marks · Very short answerBoard level
How did Bullard improve the "jig-saw fit" argument? (2 marks)
Hint
1,000-fathom line.
Answer
He used a computer to fit the Atlantic margins at the 1,000-fathom line instead of the present shoreline, and the match was nearly perfect.
Q4 · 3 marks · Short answerHarder board level
Explain how rocks and marine deposits on the two sides of the Atlantic support drift. (3 marks)
Hint
Brazil and Africa.
Answer
A belt of ancient rocks 2,000 million years old on the Brazil coast matches rocks in western Africa, and the earliest marine deposits on both coasts are Jurassic, so the ocean did not exist before that time and the continents were joined.
Q5 · 4 marks · Short answerHOTS / competency
Wegener lacked a convincing force, yet later scientists accepted continental movement. Explain what changed. (4 marks)
Hint
Convection and ocean floor.
Answer
Holmes's idea of convection currents in the mantle gave a possible force. After the Second World War ocean floor mapping showed ridges, trenches and young oceanic rocks, leading to sea floor spreading and plate tectonics, in which the lithosphere moves over a mobile mantle, replacing Wegener's weak forces.
Test your recall
Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.
1.Who named Panthalassa?Show answer
Wegener, for the mega-ocean surrounding Pangaea.
2.Which reptile is a fossil proof?Show answer
Mesosaurus.
3.When did Pangaea start to split?Show answer
About 200 million years ago.
4.Which place has placer gold with no source rock?Show answer
The Ghana coast.
Continental Drift Theory: Wegener's Pangaea and the Evidence: frequently asked questions
Who first suggested the Americas were joined to Europe and Africa?
Abraham Ortelius in 1596.
What is a palaeoclimate?
The climate of an earlier geological period.
Was "Lemuria" real?
It was an imagined linking landmass proposed to explain lemur distribution.