Heavy Metal is a kind of Rock music with loud, distorted guitars, and often - harsh, angst - ridden vocals. Black Sabbath is said to have created the genre in the 70's. Over the years, many varieties, forms and sub genres of Heavy Metal have emerged. The following are the different forms (to my knowledge) of Heavy Metal:

  • Hair Metal: Less intense then other forms of Heavy Metal, it is so called because Hair Metal musicians had big hair. It sprung up in the 80's, but fell into decadence in the early 90's. Key artists: Bon Jovi, Def Leppard, Poison, and Scorpions.
  • Stoner Rock: Laid back and relaxed and at the same time aggressiveness come to mind when listening to Stoner Rock. The tempo is slow but because the guitars are down tuned and have more distortion, the music still sounds heavy. It originated in the late 90's. Key artists: Queens Of The Stone Age, Fu Manchu and Kyuss.
  • Traditional Heavy Metal: With Black Sabbath being credited for inventing the genre in the 70's, many new forms of this loud, aggressive style of Rock would be created in the years to come. Key artists: Black Sabbath, Iron Maiden, and Ozzy Osbourne.