I remember a short cartoon series from the 70s set in a future ice age. I think it was shown within another programme, ( for some reason I thought it was The Banana Splits!)
I recall the story being about some people (children?) travelling across a frozen continent in order to find some kind of sanctuary or city. It was set in the future, possibly after a nuclear winter.
But I've been unable to find any trace of it in that). This has been bugging me for years, any ideas?