India's Hidden Giant's Causeway: St. Mary's Islands' Unique Rhyolitic Columns
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Firstpost•22-03-2026, 12:10
India's Hidden Giant's Causeway: St. Mary's Islands' Unique Rhyolitic Columns
•St. Mary's Islands, near Udupi, feature rare hexagonal rhyolitic lava columns, a geological wonder distinct from the basaltic Giant's Causeway.
•Formed millions of years ago during sub-aerial subvolcanic activity when Madagascar was still attached to India, these formations are globally unique.
•Recognized as a National Geological Monument of India, the islands offer a blend of natural beauty, historical significance (Vasco da Gama's landing), and geo-tourism.
•Coconut Island is the only one with these formations in India, offering a peaceful escape with no permanent habitation or commercial activities.
•Visitors can reach the islands by boat from Malpe, with strict rules in place to preserve its pristine environment; best visited from October to May.
