This is an irregular verb and the conjugations need to be memorized. A short lesson explains how. Mentir - French Verb Conjugations Learn how to conjugate mentir, an irregular -ir French verb. This is not an easy verb to conjugate, so you will need a good lesson to show you how.
Metamorphism occurs because some minerals are stable only under certain conditions of pressure and temperature. When pressure and temperature change, chemical reactions occur to cause the minerals in the rock to change to an assemblage that is stable at the new pressure and temperature conditions.
Metamorphic Rocks. Metamorphic rocks are other rocks (igneous and sedimentary) that have undergone high amount of pressure and temperature deep within the Earth. Metamorphism is the result of solidification of material under high temperature and pressure. There are two types of metamorphism, contact and regional.