de-glaciation

deglaciation

[dee-gley-shee-ey-shuhn, -see-]
noun Geology.
the gradual melting away of a glacier from the surface of a landmass.

Origin:
1890–95; de- + glaciation

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
deglaciation   (dē-glā'shē-ā'shən)  Pronunciation Key 
The uncovering of land that was previously covered by a glacier. Deglaciation occurs when a glacier melts.
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