St. Mary's Islands
सेंट मैरी आइलैंड्स
The sea's hexagon — volcanic basalt columns off the Karnataka coast
Era
A volcanic formation millions of years old
Built by
Cooling basaltic lava
Location
Off Malpe, Karnataka
Type
Natural Wonders
“A volcanic rock garden that looks shaped by human hands — but was shaped by fire.”
— A tribute to St. Mary's Islands
The Story
Millions of years ago, a volcano hurled out dense, viscous basaltic lava that cooled quickly. As the molten rock congealed, it contracted and cracked into a sequence of spider-web lines — forming the hexagons and polygons that today stand stacked like giant pencils on the shore.
The columns look as if they were cut by a stone mason — regular, smooth-sided, and impossibly precise. On Coconut Island, the largest of the group, the formations march down to the water's edge, where the sea has polished them into one of Bhārat's strangest coastlines.
Legend gives the islands a different origin story: local tradition says they are the petrified remains of the demon Darukasura, slain by the goddess Bhagavathi — making the site a place of both geology and pilgrimage, with an ancient church standing on the main island.
Core Ideas
Hexagonal Columns
Basalt cracked by cooling into perfect honeycomb shapes.
Born of Fire
Volcanic lava that cooled and contracted millions of years ago.
Coconut Island
The largest isle, with columns marching to the sea.
A Demon's Tale
Legend says the rocks are the demon Darukasura petrified.
A Sea Church
An ancient church stands on the main island.
Why it matters today
St. Mary's Islands are a rare window into the Earth's volcanic past — a natural gallery of hexagonal stone off the Karnataka coast, where geology wears the mask of miracle.
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