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Glacier

Glacier

An immense field or stream of ice, formed in the region of perpetual snow, and moving slowly down a mountain slope or valley, as in the alps, or over an extended area, as in Greenland.

The mass of compacted snow forming the upper part of a glacier is called the firn, or neve; the glacier proper consist of solid ice, deeply crevassed where broken up by irregularities in the slope or direction of its path. A glacier usually carries with it accumulations of stones and dirt called moraines, which are designated, according to their position, as lateral, medial, or terminal (see Moraine). The common rate of flow of the alpine glaciers is from ten to twenty inches per day in summer, and about half that in winter.

(Science: geology) glacier theory, the theory that large parts of the frigid and temperate zones were covered with ice during the glacial, or ice, period, and that, by the agency of this ice, the loose materials on the earth's surface, called drift or diluvium, were transported and accumulated.

Origin: f. Glacier, fr. Glace ice, L. Glacies.


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Which animal does this tooth belong to?

... species was world wide (maybe) It was on top of the mountain maybe because the top of the mountain was once the sea floor and as you know glaciers move and it could of been carried down from the top, the movement of the glacier has disturbed it and brought it to the surface, any signs ...

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by vk4vfx
Wed Nov 20, 2013 9:28 am
 
Forum: Zoology Discussion
Topic: Which animal does this tooth belong to?
Replies: 2
Views: 1799

Which animal does this tooth belong to?

Hi there biology experts, I found this tooth today while walking on a glacier in Austria (2500m) and I was wondering to which animal it might have belonged. As you can see, it's quite big and sharp, so I don't think it belonged to the usual herbivore animals ...

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by Clairdevries
Thu Jul 18, 2013 5:43 pm
 
Forum: Zoology Discussion
Topic: Which animal does this tooth belong to?
Replies: 2
Views: 1799

Question about evolution in progress

If we imagine a situation, lets say a couple of dark colored animals will emigrate to a glacier and then be stranded there. As time goes by, the the population will grow. If we now imagine that they have a selection pressure for being white (for one reason or another), ...

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by Kenny
Wed Dec 29, 2010 7:04 pm
 
Forum: Evolution
Topic: Question about evolution in progress
Replies: 9
Views: 4622

The Fiber Disease

... year etc. Research papers means peer review and GPs will only recognise an illness if another medically trained doctor says that it exists. The glacier at the primary care interface should recede in the next decade!!

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by in_the_uk
Wed May 31, 2006 1:13 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5560746

Global Crayfish Distribution and Interspecific Competition

... show new evidence that freshwater crayfish evolved at least 65 million years earlier than previously thought. Researchers in the Shackleton Glacier area discovered crayfish burrows in 240-million-year-old deposits of the Triassic Period, and identified a fossil claw of the Late Carboniferous-Early ...

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by Shagreen
Fri Mar 25, 2005 12:56 am
 
Forum: Zoology Discussion
Topic: Global Crayfish Distribution and Interspecific Competition
Replies: 4
Views: 16799


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