ANTARCTICA: SURVEY REVEALS MASSIVE FORMATIONS BENEATH THE ICE
Scientists have now revealed what is lying underneath the ice in Antarctica following a study.
They have announced massive formations that are as big as the Eiffel tower underneath the ice.
DISRUPTIONS OF ICE BED INTERFACE MANY METERS IN DIAMETER
One of the most striking of the observations is huge upwards disruptions of the ice-bed interface just upstream of the ice-shelf channels.
The scientists said that they are orders of magnitudes that are bigger than cross-sections of typical subglacial conduits, which are thought to be many meters in diameter.
The experts surveyed three water outlet locations that were on the ice shelf using airborne radar data and this revealed radar reflectors underneath that were distinct.
The features underneath the sheet of ice in the Antarctic are five times the size of others.
The features are said to be uncanny, and they have carved out gashes that are deep in the bottom of the sheet of ice, they play an active role in how the ice shapes many hundreds of miles away.
Ancient sheets of ice have left evidence of a hydrological system.
However, modern day features under the ice are extremely difficult to detect as they are typically small and they are usually hidden many thousands of feet under the surface.
SEDIMENT RIDGES FIVE TIMES BIGGER THAN OTHERS
Experts have been surprised by the sediment ridges and water conduits that are under the ice sheet in Antarctica as they are five times the size of others that have been seen where ancient ice retreated.
Experts said that the features are shaping the ice many hundreds of kilometers away.
The study was led by scientists from the Bavarian Academy of Sciences and Universite Libre de Bruxelles, and they found channels underground that are wider as they come to the ocean.
The melt-water speed slows down, and the channel increases in its width, while sediment is deposited and accumulates near the exit, which causes a build-up of the sediment deposits and this creates huge formations that are as big as the Eiffel tower underneath the ice, which have built up over the course of thousands of years.
The active sedimentation brings about Eskers, a ridge of gravel that is long, along with other sediments, which generally have a winding course, deposited by the meltwater from a glacier or ice sheet that is retreating.
Scientists have said that the obstacles then align with the hydrological outlets that are predicted and thus they are seen as Eskers, sediment ridge made up of composed sand and gravel, which was formed by sub-glacial water conduits overlying.
HUGE RIDGE SHAPED PROTRUSIONS CUT IN ICE IN ANTARCTICA
The experts have said that the landforms that were found on the ice shelf of Roi Baudouin in East Antarctica are bigger than they thought.
They believe that they are huge ridge-shaped protrusions cut into the Antarctica ice and these then help to form the ice shelf channels.
Researchers published a study in the Journal Nature Communications saying that the Eskers, the glacial land form that was used in the reconstruction of the paleo-ice sheets are evidence of channelized sub-glacial hydrological systems.
They went on to say that the Eskers are much bigger than the majority of the Eskers on the Wisconsonian glacial record.
However, their shape is said to look like some of the Eskers in the deglaciated regions that had been formerly occupied with the marine terminating sheets of ice.