Kalinjar Fort Hill Declared National Geo-Heritage Site
Why in the news
The Geological Survey of India (GSI) gave national geo-heritage status to the hill on which Kalinjar Fort stands in Uttar Pradesh.
Key facts
- Declared by: Geological Survey of India (GSI).
- Site: Kalinjar Fort hill, Uttar Pradesh.
- Status: National Geo-Heritage Site.
- Feature: the rare Eparchaean Unconformity.
- Time gap shown: about 1.3 billion years.
Geology of the site
| Layer | Rock |
|---|---|
| Lower, older | Ancient Bundelkhand granite |
| Upper, younger | Kaimur sandstone |
The exposed contact between these two rocks reveals the unconformity.
Significance
- The recognition underlines the scientific, geological and historical value of the hill.
Exam angle
- Agency: Geological Survey of India.
- Term: Eparchaean Unconformity, a 1.3 billion-year gap.
- Rocks: Bundelkhand granite beneath Kaimur sandstone.