https://wattsupwiththat.com/2017/08/14/scientists-discover-91-volcanoes-below-antarctic-ice-sheet/
Por fin hay evidencias reales de éste viejo tema de las erupciones en la Antártida:
The First Solid Evidence of Eruptions Under Antarctic Ice
https://www.nature.com/articles/s41598-017-11515-3http://www.realclearscience.com/quick_and_clear_science/2017/09/14/the_first_solid_evidence_of_eruptions_under_antarctic_ice.htmlBy Ross Pomeroy
September 14, 2017
In August, researchers at Edinburgh University announced that frigid West Antarctica is home to at least 138 volcanoes, all concealed within an ice sheet that’s up to two kilometers thick in some places!
The finding left Robert Bingham, one of the study’s authors, with an urgent question.
“The big question is: how active are these volcanoes? That is something we need to determine as quickly as possible,” he told The Guardian.
“If one of these volcanoes were to erupt it could further destabilise west Antarctica’s ice sheets. Anything that causes the melting of ice – which an eruption certainly would – is likely to speed up the flow of ice into the sea.”
Luckily, Bingham didn’t need to wait long for an answer. A team of scientists from New Mexico Tech, Dartmouth College, and Vermont Technical College has uncovered evidence of volcanic eruptions in ice cores taken from the West Antarctic ice sheet (WAIS). A paper describing their findings has just been published in Scientific Reports.
Nels Iverson, a PhD Candidate in Geochemistry, and his team examined an ice core situated near two known volcanoes in the ice sheet, Mount Thiel and Mount Resnick. Utilizing scanning electron microscopy and electron microprobe analysis, they found thick layers in the ice core dating back 22.3 thousand years and 44.8 thousand years. These layers were filled with tephra, rock fragments and particles ejected by volcanic eruptions (see figure below).