Metamorphic rock the foliation is called "gneissosity"), granoblastic (includes granulite, some marbles and quartzite), and hornfelsic (includes hornfels and skarn). Metamorphic rock Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure ( or more), causing profound physical or chemical change. The protolith may be a sedimentary, igneous, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by
Music of Finland such as mentioned above. Suomirock is a word that literally means Finnish rock music. However, its true meaning is a more specific one, meaning rock/pop music with Finnish lyrics. As a genre and a name it really started its life in the 1980s following the punk movement. It means rock/pop music, that is not only imitating international trends or otherwise having international sound and English lyrics, but a form of rock-music, that is recognizably Finnish and have Finnish lyrics. A more and more general and recent term is "suomipop". The boundaries between what is considered "rock" and "pop" have become