The feature pictured below is formed as a result of subsurface dissolution of limestone rock which can weaken the overlying material and cause it to collapse. These resulting features are called: 
Definitions:
Allostatic Load
The physiological wear and tear on the body that results from ongoing adaptive efforts to maintain stability (homeostasis) in response to stressors.
Present Experience
The immediate perception of events happening at the current moment, involving a focus on the here and now.
Mindfulness
Paying attention on purpose in the present moment with attitudes of curiosity, patience, nonjudgement and openness.
Negative Affectivity
The state or trait tendency to experience nervousness, fear, anger, sadness, contempt, or guilt.
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