Why is this issue in the news?

  • Researchers have stated that Africa is slowly breaking apart due to ongoing tectonic activity beneath the continent.
  • Scientific studies suggest that Africa may split into two separate landmasses within the next 5 to 10 million years.
  • This process could eventually lead to the formation of a new ocean basin.
  • The findings are based on new analysis of magnetic data and long-term geological observations.

WHAT EXACTLY IS HAPPENING TO THE AFRICAN CONTINENT?

  • Africa is undergoing a gradual but continuous geological separation.
  • The crust beneath Africa is stretching, thinning, and tearing apart.
  • Scientists compare this movement to “the zip on a jacket”, opening slowly from northeast to south.
  • The process is accompanied by volcanic activity, earthquakes, and seismic movements.

When is the complete breakup expected?

  • According to geological timelines, the continental split is expected to be completed in the next 5 to 10 million years.
  • Scientists emphasise that this is an extremely slow process, not perceptible in human lifetimes.

What will Africa look like after the split?

  • After the breakup, Africa will likely exist as two distinct landmasses.
Western African landmass This larger portion is expected to include:
  • Egypt
  • Algeria
  • Nigeria
  • Ghana
  • Namibia
Eastern African landmass This smaller block will likely include:
  • Somalia
  • Kenya
  • Tanzania
  • Mozambique
  • Large parts of Ethiopia

SCIENTIFIC BASIS: THE THEORY OF PLATE TECTONICS

  • The explanation for this phenomenon lies in the Theory of Plate Tectonics.
  • This theory states that:
    • Earth’s continents sit on tectonic plates.
    • These plates are constantly moving, though very slowly.
  • Over millions of years, continents break apart and move, leading to:
    • Formation of new oceans, and
    • Creation of new crust through seafloor spreading.
Continents have never been fixed in Earth’s history.

EAST AFRICAN RIFT

  • The most important region for this breakup is the East African Rift System.
  • It is a massive tectonic fissure about 4,000 miles long.
  • It stretches from Jordan, passing through East Africa, and reaches Mozambique.
  • The rift is approximately 30–40 miles wide on average.

WHAT CHANGES ARE OCCURING IN EAST AFRICAN RIFT?

  • The Earth’s crust in this region is weakening and pulling apart.
  • Over geological time, the rift is expected to:
    • Grow deeper, and
    • Eventually be filled by ocean water.
  • The rift is also expected to pass through major lakes such as:
    • Lake Malawi
    • Lake Turkana

THE AFAR REGION

  • Scientists have focused on the Afar region, which lies at the junction of:
    • The Red Sea, and
    • The Gulf of Aden.
Why Afar is special
  • It hosts a triple junction, where three rift systems meet:
    • Main Ethiopian Rift
    • Red Sea Rift
    • Gulf of Aden Rift
  • A triple junction is considered a classic indicator of continental breakup.
  • Scientists believe Afar shows the earliest visible stage of a new ocean formation.
AFRICA HEADING FOR A CONTINENTAL BREAKUP explained for UPSC

ROLE OF MAGNETIC DATA

  • Researchers re-analysed magnetic data collected in 1968 and 1969 using modern techniques.
  • The data was gathered using airborne magnetic surveys.
Why magnetic data matters
  • When magma cools, it records the Earth’s magnetic field direction.
  • These magnetic patterns behave like:
    • Barcodes, or
    • Tree rings, preserving geological history.

WHAT DID THE MAGNETIC DATA REVEAL?

  • The data showed evidence of ancient magnetic reversals, proving that:
    • Seafloor spreading had already occurred between Africa and Arabia millions of years ago.
  • This confirms that the region has been undergoing slow but steady rifting for tens of millions of years.
Evidence of steady rifting
  • The Earth’s crust in the rift zone is stretching like soft material.
  • Over time, this stretching leads to:
    • Thinning of crust
    • Eventual rupture
    • Formation of a new ocean basin

SPEED OF THE CONTINENTAL BREAKUP

  • According to Dr Emma Watts, a geochemist at Swansea University:
    • The plates are currently separating at a rate of about 5 to 16 millimetres per year in the northern section.
  • This confirms that while the process is active, it remains extremely slow.