Not continents, no, but it did cover up areas like what used to be the land bridge between Asia and North America where the Bering Sea is now. And many coastlines were dramatically different then.
https://en.wikipedia.org/wiki/Beringia#/media/File:Beringia_land_bridge-noaagov.gif
view the above link for an animation.
Things happen slowly in the scheme of things. Check this out: Is a mini ICE AGE on the way? Scientists warn the sun will ‘go to sleep’ in 2030 and could cause temperatures to plummet
New study claims to have cracked predicting solar cycles
Says that between 2030 and 2040 solar cycles will cancel each other out
Could lead to ‘Maunder minimum’ effect that saw River Thames freeze over. Read more:http://www.dailymail.co.uk/sciencetech/article-3156594/Is-mini-ICE-AGE-way-Scientists-warn-sun-sleep-2020-cause-temperatures-plummet.html
