From a distance it looks like nothing more than a sprawling pile of rocks high in Utah’s Wasatch Range. But beneath the rubble of Mount Timpanogos is a spectacular hidden reservoir: ice enough to hold some 1.55 million cubic meters of water, which is about 600 Olympic-sized swimming pools.

And there are more than 50,000 others like it worldwide

Study by University of Utah geoscientists creates 3D map of a hidden ‘rock glacier’ in the Wasatch Mountains, one of more than 800 in Utah. The team used their novel method of…