Geology and Minerals
Borra Caves (Telugu: Borrā Guhalu) are a limestone cave system in Ananthagiri hills of the Araku Valley in Alluri Sitharama Raju district, Andhra Pradesh. They feature extensive karst formations, including stalactites, stalagmites, and other speleothems. "Borra" means "hole" in Telugu language.
Geology of the Tasman District.
2014–2015 eruption of Bárðarbunga.
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