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fissure eruption

British

noun

the emergence of lava from a fissure in the ground rather than from a volcanic cone or vent

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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fissure eruption

The platinum spike may have come from a volcanic fissure eruption in Iceland rather than an object from space.

From Science Daily ● Mar. 20, 2026

Reykjavik's Meteorological Office said that just after midnight an estimated 1-km-long fissure eruption began in a lava field north of the Vatnajokull glacier, which covers part of Bardarbunga system.

From Scientific American ● Aug. 29, 2014

"The main eruption was in April, but in March there was a fissure eruption which was a precursor to the much larger eruption."

From Scientific American ● Aug. 29, 2014

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023