Journey to the end of the Earth Tishani Doshi Before you read | Class 12 English Notes

Part of history

This section delves into the geological history of Antarctica, explaining its origin as part of the ancient southern supercontinent Gondwana approximately 650 million years ago. Gondwana was a massive landmass centered roughly around present-day Antarctica, hosting a warm climate and diverse flora and fauna long before humans appeared. For 500 million years, Gondwana thrived until tectonic forces caused it to break apart around the time dinosaurs became extinct and mammals began to dominate. This breakup led to the formation of the continents as we know them today, including the northward drift of India which collided with Asia to form the Himalayas. The separation of South America and North America opened the Drake Passage, creating a cold circumpolar current that keeps Antarctica frigid and isolated at the bottom of the world. The author reflects on the geological processes such as Cordilleran folds and pre-Cambrian granite shields, and the role of Antarctica in understanding evolution, extinction, and climate change. The vast ice volumes stored in Antarctica, covering 90% of Earth's ice, and the surreal 24-hour daylight during austral summer, emphasize the continent's unique environment. The section highlights the importance of Antarctica in understanding Earth's geological past and the potential future changes due to natural and anthropogenic factors.

📊 Diagram: The section includes an image (img-0.jpeg) depicting Antarctica’s landscape, possibly showing icebergs or the vast icy terrain, symbolizing the continent’s geological and climatic features.

🧪 Activity: No specific activity is mentioned in this section.

🔗 Connection: This section sets the foundation for the next part, 'Human impact,' which discusses how human activities have affected the Earth and Antarctica’s role in climate change studies.