Why in the News?
Recent research has uncovered evidence of ancient wildfires (palaeofires) in the Godavari Basin, shedding light on Earth’s geological and climatic history from over 250 million years ago.
What are Palaeofires?
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Ancient Palaeofires in the Godavari Basin:
- Palaeofires, traced back to the Permian period, provide evidence of how fires influenced prehistoric landscapes.
- Advanced techniques like Raman Spectroscopy and FTIR Spectroscopy were used to differentiate between in situ (on-site) and ex situ (transported) charcoal.
- The research also highlighted how sea level changes impacted charcoal deposition, with well-preserved fire signatures during regressive phases and more oxidized charcoal during transgressive phases.
- These findings contribute to understanding carbon storage in the Earth’s crust and provide insights into past climate dynamics and fire behavior.
Role of Palaeofires in Earth’s Past:
- Palaeofires were crucial in shaping Earth’s climate, vegetation, and contributing to coal formation across various geological periods.
- During the Permian period, palaeofires were widespread in Gondwana, affecting plant life and coal deposits.
- Fossil charcoal found in coal-bearing formations like the Raniganj Coalfield suggested a connection between seasonal droughts and wildfires.
- These wildfires influenced vegetation patterns and led to the accumulation of carbon-rich deposits.
- High atmospheric oxygen levels likely intensified these wildfires, significantly affecting both climate and ecosystem changes.
- Understanding palaeofires helps in grasping long-term carbon sequestration processes.
| [UPSC 2001] The approximate age of the Aravalli range is:
Options: (a) 370 million years (b) 470 million years (c) 570 million years* (d) 670 million years |
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