glaciation

nouns

the condition of being covered with glaciers or masses of ice; the result of glacial action
"Agassiz recognized marks of glaciation all over northern Europe"
is derived from
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is a type of (narrower)
the state of the environment
the process of covering the earth with glaciers or masses of ice
is derived from
is derived from
is derived from
is a type of (narrower)
(geology) a natural process whereby geological features are modified