Metamorphic rock 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 texture and by chemical and mineral assemblage (metamorphic facies). They may be formed simply by being deep beneath
Loosely Tight Cocks), and drummer, Rick Gomez. Delong and Gomez provided the rhythm section. Livingston continued to write songs and play guitar. On December 20, 2011, the band leader and lead singer, Dino (Dennis Wayne) Livingston, died of complications from diabetes. In 2012, Phoenix New Times chose Loosely Tight's song "Bombs Away" as one of the songs from 1981 which defined Arizona. Loosely Tight Loosely Tight is an American hard rock band originally based out of Phoenix, Arizona. The band came to prominence after taking top honors at the 1979 California World Music Festival held at the Los Angeles Memorial Coliseum. More