Summary
Highlights
The collision of the Indian and Eurasian plates, occurring 50 million years ago, resulted in the formation of the Himalayas, the world's highest mountain range. This event also brought about global climate change and major earthquakes, like the M7.8 Nepal earthquake in 2015. Plate tectonics, the movement of Earth's massive plates, is the underlying cause for these geological phenomena, driven by molten currents beneath the surface.
Rewind 550 million years ago, India was part of the supercontinent Gondwanaland. After Gondwanaland fragmented, India broke off and began a rapid northward journey, crossing 9,000 kilometers in 70 million years. This unprecedented speed, nearly 20 centimeters per year compared to the usual 5 centimeters, contributed to the immense scale of the Himalayas upon impact.
Geologists describe the Indian subcontinent as a 'Viking Funeral Ship' because it carried a treasure trove of ancient fossils, like Glossopterris and Lystrosaurus, from Gondwanaland. These fossils, also found on other southern continents, proved the existence of Gondwanaland and supported plate tectonics. India also transported living species, fostering unique evolutionary developments, including the ancestors of modern whales, as it drifted.
India's collision not only shaped landforms but also altered local and global climates. The Himalayas and Tibetan Plateau created the Asian Monsoon cycles by drawing in humid air from the Indian Ocean, causing heavy seasonal rains. The Himalayan water system sustains a fifth of the world's population, and the immense erosion from these mountains formed the Bengal Delta. The collision also led to silicates in the Himalayas absorbing massive amounts of CO2, initiating global cooling and the last Ice Age.
The Indian plate continues to move and collide with the Eurasian plate, causing the Himalayas to grow and leading to ongoing earthquakes in the region. This continuous geological activity highlights that the collision of India with Asia remains one of the most significant and evolving events in Earth's 4.5-billion-year history.