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User / Diana Michaels / Natural Castle
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Lóndrangar are a pair of sharp and steep cliffs, or volcanic plugs of basalt, that have been hewn out from softer surrounding rock by erosion. At 75 m and 61 m respectively, they are quite a sight.

Lóndrangar are volcanic plugs left out as remnants from a bigger crater, which has since mostly eroded away with time.

And what is a volcanic plug, and how does it form?

Also called a volcanic neck or lava neck, it is created when magma hardens within a vent on an active volcano.

When forming, a plug can cause an extreme build-up of pressure if volatile-charged magma is trapped beneath it. This can sometimes lead to an explosive eruption. But if a plug is preserved, erosion may remove the surrounding softer rock while the erosion-resistant plug remains, producing a distinctive upstanding landform.

I like volcanoes :)
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Dates
  • Taken: Sep 19, 2011
  • Uploaded: Oct 7, 2011
  • Updated: Dec 17, 2012