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Canary Island volcano: A new island in the making?

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Author Topic: Canary Island volcano: A new island in the making?  (Read 708 times)
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Guanche of Tenerife
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« on: December 04, 2011, 12:41:36 am »

The magma sheet

What we're seeing on El Hierro is an active fracture zone, running more or less north-south. And that fracture zone acts as a channel for magma, moving from depth to the surface, in a structure that we describe as a "dyke" - it's like a vertical sheet of magma.

That sheet of magma translates into an eruption centre that is in the south, but also creates a lot of seismicity in the north. It's all connected.

It's normal that these sheets of magma, as they approach the surface, channel into individual conduits, rather than cause a full fissure eruption.

Dr Joachim Gottsmann, volcanologist
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