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Candles and gypsum bubbles

These include the deep vertical furrows created along steep walls, referred to as candles because of their particular shape and formed by the run-off of water along the lines of greatest slope.

Instead, on other outcrops you'll find unusual bulges, revealing, through their small openings, bizarre dome-shaped cavities.

These are gypsum bubbles, created from complex dissolution and recrystallization processes that cause the recrystallized rock mass to increase in volume, resulting in the buckling and detachment of a gypsum crust.