Scientists just found a lost river world buried beneath Antarctica’s ice for 34 million years
GS1इतिहास · समाज · भूगोल· Physical geography (landforms, oceans, climate)· Prelims·
चर्चा में क्यों
An international team led by Durham University discovered a vast ancient landscape of 31 flat surfaces formed by rivers buried beneath the East Antarctic Ice Sheet.
पृष्ठभूमि
The discovery was made using the British Antarctic Survey's airborne radar technology to map bedrock beneath the ice. These surfaces were formed by rivers that flowed across the continent before being covered by ice approximately 80 million years ago.
प्रीलिम्स के लिए तथ्य
- विज्ञान-तकनीकAirborne radar technology was used to map the bedrock beneath the East Antarctic Ice Sheet.
- स्थानThe discovery was made beneath the East Antarctic Ice Sheet.
- तथ्यResearchers identified 31 flat surfaces formed by ancient rivers.
- तथ्यThe surfaces were formed before being covered by ice approximately 80 million years ago.
मेन्स के लिए
Q. How do sub-glacial geological features influence contemporary glacial dynamics and the accuracy of global sea-level rise projections?
उत्तर के आयाम
- Glacial dynamics: Sub-glacial topography influencing friction and flow velocity of ice sheets
- Climate modeling: Complexity in predicting sea-level rise due to hidden geological features
- Technological intervention: Role of airborne radar in mapping inaccessible polar terrains
कीवर्ड: Glacial dynamics · Sub-glacial topography · Sea-level rise · Remote sensing · Cryospheric research
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