Over the following weeks, both expeditions laid depots for their southern journeys--Scott following Shackleton's route, Amundsen pioneering his own, a direct course for the pole across the Ice Barrier
Basically the position of the ice dam is recognized from two observations: the presence of one or more major terminal moraines deposited when there was a hiatus during the period of ice recession, and the disappearance (or weakening) of beaches as the ice barrier
is approached (so that beaches are found only on the sides of the basin where the ice barrier
Unable to drain off because of the ice barrier
, the water exerts so much pressure for so long, against and beneath the obstruction, that eventually it demolishes the ice dike completely.
I had come to Antarctica's Ross Island as part of an international team investigating how the ocean current flowing under a floating ice barrier
leaves eddies and turbulence in its wake.
These can take various forms, such as finding a source of fire, to melting an ice barrier
, or watering a seed so it can grow to fill a gap left by a missing platform.
During the return trip across the polar plateau, along the Beardsmore Glacier and onwards across the Great Ice Barrier
, Scott and his party died from cold and starvation.
The Great Ice Barrier
, where Scott's party perished in 1912, was so named because it presented a barrier to Erebus and Terror (it was re-named the Ross Ice Shelf in the 1950s).
Among its achievements were the first ascent onto the Polar Plateau and a `farthest south' of 82[degrees] 28'S over the Great Ice Barrier
(now the Ross Ice Shelf).
Warmer ocean water has thawed the base of frozen bluffs and destroyed natural ice barriers
protecting the coast, causing large earth chunks to fall each summer, the scientists said.
056-kg) snow stop roof bracket that supports snow and ice barriers
installed on steel-covered roofs;
Initially, most researchers assumed that humans moved south only after the opening of the continental ice barriers
at approximately 12,000 BP.