The team used an array of tools including seismic wave reflection, radar, and precise gravitational measurements to map the frozen features - there are a lot more differences between ice and rock than “one works in drinks”, and they used them all. If “Sub-Antarctic Mountain Range” isn’t good enough for you, the valleys between the peaks come complete with rivers and lakes - yes, lakes. Under the ice. At the South Pole.
The mountains are a massive mystery - they seem to be half a billion years old, but on a tectonic scale you can’t just say “that’s a long time ago so who cares.” There are no other indications of such titanic tectonics in the area at the time, and the range has none of the signs of volcanic formation. Which is a pity, as volcanoes erupting into thousands of tons of solid ice is probably the only way this incredible landscape could sound any more awesome.
The researchers predicted a flat plateau, but instead found a range similar in height and shape to the Alps - with massive peaks as high as Mount Blanc and deep valleys.
Water, turned to liquid due to the pressure of East Antarctic Ice Sheet above, could be seen in rivers and lakes nestled in valleys. One lake, Vostok, a possible living biological lab of ancient lifeforms, was an incredible 300 kilometers.
Scientists hope the findings will aid predictions about the effects of climate change on ice sheets and challenge long-held views that the ice sheet formed over millions of years.The new research suggests they formed in a fraction of the time and the area could have been ice free at some points in history.
This means any rapid fluctuation in global temperature could have a much faster effect on the formation of ice sheets than previously thought
Posted by Luke McKinney
Related Galaxy posts:
Secrets of Antarctica’s 15-Million Year-Old Lake -A Galaxy Classic
World’s Oldest Living Microbes May Cast Light on Aging & Life on Mars
Will Jupiter’s Moon -Europa- Provide the 1st Proof of Extraterrestrial Life? -A Galaxy Insight
Ancient Antarctic Microbes Revived in Lab
Antarctica -Mapping The White Continent
Links:
http://www.unspecial.org/UNS633/UNS_633_T13.htm
A PDF on the Vostok drilling
Wiki to Vostok -
Wiki on the Antarctic Treaty

0 comentários:
Enviar um comentário