Recently, UNESCO placed the Varkala Cliff in Kerala on its tentative list of World Heritage Sites. It is located in Varkala town, Thiruvananthapuram district of Kerala. The cliff exposes the Warkalli Formation of the Mio-Pliocene age, dating from 13 lakh to 2.5 crore years ago. It is locally known as Sivagiri Thuruthu. The cliff has laterite and sedimentary layers with fossils and traces of ancient climates. It serves as a crucial aquifer, supports biodiversity, underwater reefs, and coastal fishing. It is India’s 27th national geological monument and the second in Kerala after Angadipuram Laterite.
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