unfreezing

Noun

 * 1) The process of something being unfrozen.
 * 2) * 2015, Kevin Revolinski, 60 Hikes Within 60 Miles: Madison (page 116)
 * and the sloping collection of fractured rocks—known as talus—that tumbled down from the quartzite bluffs during the repeated freezings and unfreezings of the last Ice Age.