To cover with ice or glaciers, or to subject to glaciation during an ice age.
From Latin glacies (ice) with the suffix -ate forming a verb meaning 'to cause to become.' Used to describe geological processes of glacier formation and advance.
North America was glaciated multiple times—the last ice sheet melted only 10,000 years ago, which is why the Great Lakes exist and why New York's bedrock is so valuable for skyscrapers!
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