glacial

Upstream, a glacial lake had formed, then suddenly burst - sending water, boulders and debris cascading down the valley and gathering speed.

As glacial ice melts, the downward pressure on Earth’s thin outer crust eases, causing the ground to rebound.

Its glacial pace, often accompanied by a viscous sludge it leaves behind, make it a messy if inoffensive kind of pest.

The landslide - a mountainside of rock that collapsed and carried glacial ice with it - triggered a 200m wave.

The glacial tongue is famed for its ice caves, with groups offering tours.