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 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 than 2100 bands entered the competition and shared the stage with Cheap Trick, Aerosmith, and Van Halen. In conjunction with their festival success, the Loosely Tight song "Rough and Tough" was the lead off track for radio station KDKB (93.3 FM)'s 1979 album, "Arizona Sounds Volume 3". After a brief stint with Capitol Records, the band's album "Fightin' Society" (1981)