Thrash metal is an extreme subgenre of heavy metal music characterized by its overall aggression and fast tempo. The songs usually use fast percussive beats and low-register guitar riffs, overlaid with shredding-style lead guitar work.
Kirk Hammett and James Hetfield of Metallica (pictured in 2008). Metallica's early work is regarded as essential to the development of the genre in the 1980s.
New York band Anthrax was among the earliest and most successful thrash acts.
Venom's early work is considered a major influence on thrash metal.
Slayer (pictured in 2007) released Reign in Blood in 1986, considered a landmark achievement in the genre's history.
Extreme metal is a loosely defined umbrella term for a number of related heavy metal music subgenres that have developed since the early 1980s. It has been defined as a "cluster of metal subgenres characterized by sonic, verbal, and visual transgression".
Venom in 2008
Venom were significant to the development of speed metal into thrash metal into black metal.