Snow/Talk

Much of the earths fresh water is held by gigantic glaciers in the north and south poles, formed by falling snow over milennia.

There's a different between glaciers, ice fields, and polar caps. Are we sure that caps are formed from falling snow? I was under the impression that Antarctica got almost no precipitation at all, and the ice sheet expanded and contracted by simple melting and freezing.

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The ice caps are formed from falling snow. Almost no precipitation is not equal to no precipitation at all; if it never gets above freezing, it will eventually accumulate no matter how little falls. -- Paul Drye