glaciation's

glaciate

[gley-shee-eyt, -see-]
verb (used with object), glaciated, glaciating.
1.
to cover with ice or glaciers.
2.
to affect by glacial action.
verb (used without object), glaciated, glaciating.
3.
to become frozen or covered with ice or glaciers.

Origin:
1615–25; < Latin glaciātus (past participle of glaciāre to freeze), equivalent to glaci(ēs) ice + -ātus -ate1

glaciation, noun
unglaciated, adjective
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World English Dictionary
glaciate (ˈɡleɪsɪˌeɪt)
 
vb
1.  to cover or become covered with glaciers or masses of ice
2.  (tr) to subject to the effects of glaciers, such as denudation and erosion
 
glaci'ation
 
n

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