The following points highlight the four main forms and types of metamorphism. The types are:- 1. Contact Metamorphism 2. Regional Metamorphism 3. Hydro-Metamorphism 4. Hydro-Thermo-Metamorphism. Type # 1. Contact Metamorphism: Contact metamorphism takes place when the mineral composition of the surrounding rocks known as aureoles is changed due to intense heat of the intruding magmas. […]