Kind: captions
Language: en
as we go down here this is quite narrow
here we just make it this is really
really neat after squeezing through the
neck they're confronted with an amazing
sight wa look at that yeah it's beauti
a vast chamber dropping 450 ft below the
surface 4,000 years ago when the magma
drained the chamber remained remarkably
intact it's the only place on Earth
where scientists can study a volcano
from the
inside really
impressive frein sigmon is looking for
evidence of how volcanoes like this are
fed by molten rock it's been something
of a mystery until
now look at
this can you see the fracture can wow
it's actually really cool how it goes
up this is absolutely unique place that
is fantastic we can see the fissures
that fed magma into this volano this
black line in the wall here it's a crack
that delivered magma to the Arup
now the magma is solidified in this
fissure this fissure acted like a giant
vein pumping magma into the chamber
horizontally as well as from deep
below what is so special is we can
clearly see it both
sides the fissure sliced right through
the chamber and out the other side and
frein is working out which direction it
took if you trace it we can get
orientation of this
Crack by lining up the fissure on either
side of the chamber the team finds the
exact route it took and makes an
important
[Music]
Discovery what we have found out is that
they can go on for many miles they are
very like they're like thin sheets they
can link different
volcanoes so although volcanoes appear
isolated on the surface fissures
carrying magma can link them
underground and that's an important
consideration in trying to predict which
of Iceland's volcanoes might erupt next