Favourit of the week: a glacier’s blue hues
This week’s favourit goes to show there is no limit to what can be a favourit. At first we weren’t even sure whether it was genuine or somebody trying to have a laugh with us, as the favourit that was added was actually a glacier. Miquel Martin (he’s the one on the picture next to the crevice) added the Perito Moreno Glacier as one of his favourits and added it was due to the amazingly beautiful hues of blue of the glacier. But there is more to this than just shiny ice:
"The Glacier actually advances (up to 2m/day in the middle!) so over time, it grows over the ‘river’ it flows into, actually blocking it! When this happens, a natural ice dam is formed, and the water level on one side of the river will keep on rising and rising, while the other side will remain lower and lower. Eventually, the water level goes high enough that the pressure is enough to break the wall of ice and then… kaboom! We are talking about thousands of tons of water here, building pressure against thousands of tones of ice. It’s quite a show! Unfortunately, this year it happened at 4am a couple of weeks before I arrived so no one saw it! Here’s a video of what it looks like. First, a hole forms creating an arch, and then, as the water rushes in, it all falls apart.
This is one wonder of nature you sure don’t want to miss!”
So, now that we’ve established that glaciers can be favourits (thanks Miquel!) we can’t wait to see: what’s next…