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.
The three causes of Metamorphism in Rocks. Metamorphism in geology is when one type of rock is transformed into another type of rock called a metamorphic rock. The word metamorphic comes from the Greek words meaning âchangeâ and âform.â There are two main factors that can cause the conversion: heat, pressure.