The 150 foot Ice Wall is on the coast of Antarctica. It is widely known and widely studied. The Ice Wall is a massive wall of ice that surrounds Antarctica. The shelf of ice is several hundred meters thick. This nearly vertical ice front to the open sea is more than 50 meters high above the water's surface.
The Ice Wall was discovered by Sir James Clark Ross, a polar explorer who was among the first to venture to Antarctica in an attempt to determine the position of the South Magnetic Pole. Upon confronting the massive vertical front of of ice he famously remarked
"It was ... an obstruction of such character as to leave no doubt in my mind as to our future proceedings, for we might as well sail through the cliffs of Dover as to penetrate such a mass.
It would be impossible to conceive a more solid-looking mass of ice; not the smallest appearance of any rent or fissure could we discover throughout its whole extent, and the intensely bright sky beyond it but too plainly indicated the great distance to which it reached southward."
James Clark Ross and his expeditionary fleet sailed around the Ice Wall for a number of months in circumnavigation. Between pit stops at the Cape of Good Hope and his polar expeditions, he spent the next five years of his life circumnavigating the southern coast vainly in search of find a south sea passage to the other side. In his book "South Sea Voyage," James Clark Ross reports a total voyage of over 60,000 nautical miles.
Beyond the 150 foot Ice Wall is anyone's guess. How far the ice extends; how it terminates; and what exists beyond it, are questions to which no present human experience can reply. All we at present know is, that snow and hail, howling winds, and indescribable storms and hurricanes prevail; and that in every direction "human ingress is barred by unsealed escarpments of perpetual ice," extending farther than eye or telescope can penetrate, and becoming lost in gloom and darkness. Some hold that the tundra of ice and snow stretches forever eternally.
Edge of the known world:
http://i23.tinypic.com/nwkp5t.jpgThe Ice Wall is a natural formation, a thick mass of floating ice that is attached to land, formed from and fed by tongues of glaciers extending outward from deep within the uncharted tundra into sheltered waters. Where there are no strong currents, the ice becomes partly grounded on the sea bottom and attaches itself to rocks and islands. The wall is pushed forward into the sea by glacial pressure until its forward growth is terminated.
The entire coast of the Ice Wall is not one single complete wall, however. There are actually a series of thousand mile long walls, divided by Transantarctic Mountain Ranges up to 11,500 feet high. The weight of The Ice Walls are so enormous that they have literally pressed the land two thirds of a mile (one kilometer) into the earth. Under the massive forces of their own weight, the ice walls deform and drag themselves outward. Very large glaciers called ice streams flow through them continually, transporting ice from deep inland out to the sea.
Temperatures approach absolute zero the further one explores outwards. Exploration in this type of pitch black freezing environment is impossible for any man or machine. We live on a vast plane with an unknown diameter and an unknown depth. Dr. Samuel Birley Rowbotham held that knowing the true dimensions of the Earth is something which will be forever be unknowable by man.