metamorphism
Thaum lub pob zeb yog qhov tseem ceeb hauv lub xeev, nws raug rau qhov kub thiab txias thiab muaj dej muaj kuab lom, thiab kev ua haujlwm geological ntawm cov tshuaj muaj pes tsawg leeg, kev sib xyaw tshuaj, pob zeb qauv thiab kev hloov pauv hloov hu ua metamorphism.