Pangaea, which means “all lands” in Greek, was a landmass that consisted of all the continents we know today fused into one giant continent. It was situated near the Earth’s equator; however, unlike the present continents, Pangaea did not have any polar ice caps. The vast supercontinent covered around one-third of the Earth’s surface, stretching from the North Pole to the South Pole.
Wegener based his theory on several pieces of evidence, including similarities between rock formations, plant and animal fossils, and mountain ranges across different continents. He proposed that the continents were once joined together and drifted apart over time. This theory, known as continental drift, faced considerable skepticism at the time. However, it laid the groundwork for our understanding of plate tectonics.
The formation of Pangaea began around 335 million years ago when the ancient supercontinent Rodinia started breaking apart. As the continents drifted apart, they gradually moved towards each other, eventually joining together to form Pangaea. This collision caused the formation of massive mountain ranges such as the Appalachians in North America and the Ural Mountains in Russia. The interior of Pangaea was dominated by vast desert areas, surrounded by extensive tropical and subtropical regions.
Pangaea’s existence had profound effects on Earth’s climate and life forms. The massive landmass resulted in extreme weather patterns, with seasonal precipitation and temperature variations. The interior regions experienced arid conditions due to the lack of moisture from the oceans. However, the coasts of Pangaea were lush and supported diverse ecosystems.
The ancient supercontinent also had a significant impact on the evolution and distribution of plants and animals. With the continents fused together, species could freely migrate between different regions. However, as Pangaea started breaking up, the isolation of land masses resulted in the development of unique species in isolation. This led to the eventual divergence of flora and fauna, giving rise to the diverse ecosystems we see today.
Approximately 200 million years ago, Pangaea began to break apart. The process of continental drift initiated the of the supercontinent into two major landmasses—Laurasia in the north and Gondwana in the south. Over millions of years, these two landmasses continued to fragment into the continents we recognize today.
The breakup of Pangaea resulted in the formation of various mountain ranges, such as the Andes, the Alps, and the Himalayas. It also created new ocean basins, including the Atlantic Ocean. As the continents moved away from each other, new geological features emerged, and the Earth’s climate and ecosystems underwent significant changes.
The story of Pangaea is a fascinating chapter in Earth’s geological history. This once-enormous supercontinent existed for millions of years, shaping the planet’s climate, landforms, and the evolution of life itself. While it no longer exists in its original form, Pangaea laid the foundation for the continents we know today. Understanding its formation and breakup allows us to appreciate the dynamic nature of our planet and the forces that have shaped it over millions of years.