Ice core
Similar term(s): carrots.
Definition:
Cylinders of ice obtained by drilling into a glacier.
Since the different layers of ice are formed over time through build-up of snow, ice cores provide information on climate from different periods (up to almost one million years) that can be used for research.
Source: GreenFacts
More:
Deep ice core from Law Dome (Antarctica) 
Source: Vin Morgan © Australian Antarctic Division 2006 Kingston Tasmania 7050 -
Australian Antarctic
Magazine
To read about this term in context:
GreenFacts Summary on Arctic Climate Change:
Translation(s):
Español: Testigo de hielo
Français: Carotte de glace
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