We used to have Ice Ages. Big, long and chilly, that was the Rhino Assessment.
If you want to make your own Glacier, you need special ingredients: First you need a Lot of Snow, plus cold temperatures to prevent melting the Snow away. Then add a lot of Time, and the Snow mounts up: Voila!, your very own Glacier.
Or maybe not. It turns out that Nature has to do projects this large. They are trickier than they look.