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Icebergs in the Antarctic area sometimes have
stripes, formed by layers of snow that react to different conditions.
Blue stripes are often created when a crevice in the ice sheet fills up
with meltwater and freezes so quickly that no bubbles form. When an
iceberg falls into the sea, a layer of salty seawater can freeze to the
underside. If this is rich in algae, it can form a green stripe.
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Langjokull Glacier
The Long Glacier (1355m) is the second largest in Iceland. It has an
area of about 950 km² and most of it rises between 1200 and 1300 m above
sea level. It rests on a massif of hyaloclastite mountains. They rise
highest under its southern and northern parts, but have not yet been
researched thoroughly. The Glaciological Society owns a hut at the foot
of the nunatak Fjallkirkjan (1228m). The southwestern part of the icecap
is called Geitlandsjokull. It rises to the elevation of 1400 metres. On
a fine day the view from up there is excellent.
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Perito Moreno Glacier
The Perito Moreno Glacier is a glacier located in the Los Glaciares
National Park in the south west of Santa Cruz province, Argentina. It is
one of the most important tourist attractions in the Argentine
Patagonia. The 250 km2 (97 sq mi) ice formation, and 30 km (19 mi) in
length, is one of 48 glaciers fed by the Southern Patagonian Ice Field
located in the Andes system shared with Chile. This icefield is the
world's third largest reserve of fresh water.
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Antarctica Iceberg Glacier
Icebergs in the Antarctic area sometimes have stripes, formed by layers
of snow that react to different conditions. Blue stripes are often
created when a crevice in the ice sheet fills up with meltwater and
freezes so quickly that no bubbles form. When an iceberg falls into the
sea, a layer of salty seawater can freeze to the underside. If this is
rich in algae, it can form a green stripe. Brown, black and yellow lines
are caused by sediment, picked up when the ice sheet grinds downhill
towards the sea.
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Ice discs
ce discs form on the outer bends in a river where the accelerating water
creates a force called 'rotational shear', which breaks off a chunk of
ice and twists it around.As the disc rotates, it grinds against
surrounding ice — smoothing into a circle.[2] A relatively uncommon
phenomenon, one of the earliest recordings is of a slowly revolving disc
was spotted on the Mianus River and reported in a 1895 edition of
Scientific American.
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Ice circle
An ice disc, ice circle, or ice pan is a natural phenomenon that occurs
in slow moving water in cold climates. Ice circles are thin and circular
slabs of ice that rotate slowly in the water. It is believed that they
form in eddy currents. Ice discs have most frequently been observed in
Scandinavia and North America, but they are occasionally recorded as far
south as England and Wales. An ice disc was observed in Wales in
December 2008 and another was reported in England in January 2009. Ice
circles vary in size but have been reported to be more than 4 metres (13
ft) in diameter.
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