Under construction… check out these links in the meantime:
https://www.cambridge.org/core/journals/journal-of-glaciology/article/waterfall-ice-mechanical-stability-of-vertical-structures/BA97B8E2B265C97A5EE9531506CE4F58
https://www.nature.com/articles/ngeo2686
https://www.eocaconservation.org/conservation-section.cfm?pageid=11§ionid=25