heavy metal evolution movement

70'an
Heavy Metal initial 70'an guarded by bands like Led Zepplin, Black Sabbath, and Deep Purple, Heavy Metal in that era are still influenced by the blues element that thick. Judas Priest to develop the genre by eliminating the elements of blues and more rely on distortion, a faster beat, and harmony. By the end oF 70'an munculah New Wave of British Heavy Metal that pioneered Motorhead, NWOBHM combines punk and heavy metal. Other NWOBHM bands are Iron Maiden, Saxon, Venom, Diamond Head, etc..

Early 80'an
In the early era 80'an gawangi by bands such NWOBAM Motörhead, Iron Maiden, Venom and Diamond Head. Heavy Metal finally collided handle links by Pop music it brought the genre called Glam Metal, Glam Metal managed to break through chart chart-top, Heavy Metal, this causes more spread rapidly around the world