Pangaea
Pangaea was the most recent supercontinent to join nearly all of Earth's major landmasses, shaping climates, oceans, fossils, and the later arrangement of modern continents.
What Pangaea was
Pangaea was a supercontinent, a huge landmass that brought together most of the continents now separated by oceans. It was not the first supercontinent in Earth's history, but it is the best known because its breakup led directly toward the present arrangement of the continents.
How it formed
Pangaea assembled slowly as tectonic plates carried older continents and smaller blocks into collision. Continents do not slide freely over the planet like loose tiles; they are parts of moving plates driven by heat, gravity, subduction, and mantle circulation. Over hundreds of millions of years, collisions closed old oceans and built mountain belts where landmasses met.
Panthalassa and interior climates
A superocean called Panthalassa surrounded Pangaea. The landmass itself was so large that many interior regions were far from ocean moisture. That helped create strong seasonal contrasts, broad dry areas, and climates unlike those on today's smaller, more separated continents.
Continental drift and evidence
Alfred Wegener proposed continental drift in 1912, using clues such as the fit of South America and Africa, fossil distributions, and matching rock units across oceans. Wegener did not have the modern mechanism of plate tectonics, so the idea was controversial for decades. Later evidence from seafloor spreading, paleomagnetism, earthquakes, and ocean-floor mapping gave continental drift a physical framework.
Breakup and new oceans
Pangaea began to break apart as rifts opened within the supercontinent. North America and Africa started separating, and the Atlantic Ocean began to form. Breakup did not happen in one clean split. Different pieces moved at different times, producing rift valleys, volcanic activity, changing coastlines, and eventually the continents and ocean basins familiar today.
Life on a connected world
Pangaea changed the paths available to plants and animals. Land connections allowed some organisms to spread widely, while deserts, mountains, and climate belts still created barriers. Fossils from the late Paleozoic and early Mesozoic help scientists reconstruct where continents were and how ecosystems changed as the supercontinent assembled and broke apart.
Not the only supercontinent
Pangaea was part of a longer supercontinent cycle. Geologists have proposed earlier supercontinents such as Rodinia, Columbia or Nuna, and others, though their exact shapes and timing are harder to reconstruct because older rocks have been altered, buried, or recycled. Future continents may also merge into new supercontinents over hundreds of millions of years.
Why it matters
Pangaea helps explain why geology on opposite sides of oceans can match, why fossils appear in patterns that seem strange on a modern map, and why plate tectonics is central to Earth's history. It also reminds us that the familiar world map is temporary. Continents, oceans, mountains, climates, and habitats are all moving parts of a deep-time system.