Montana Public Radio

ice

Needle Ice: A Freeze-Frame Of Capillary Action

Jan 19, 2020
Needle ice pushing up soil particles
Thomas Bresson (CC-BY-2.0)

It was midnight and dark, but when my boots made crunching noises as I walked along the dirt road, I knew what was underfoot: tiny, clustered pillars of ice lifting the top layer of soil debris from the road.  Now, in the light of the morning, the ice pillars look like miniature, partially buried, delicate ice castles.  I am as intrigued by them now as I was when I first noticed them a few years ago, both here by Flathead Lake and up along McDonald Creek in Glacier National Park.