Continuing on from last installment we find that Early Metal has evolved into to all the many different genres we know today. It gave us Original Hard Rock (1974 -1979) with bands like Thin Lizzy, Blue Oyster Cult, Aerosmith and of course the Motor City Madman Ted Nugent created sounds lead into other genres like Pop Metal with bands who crossed genres from Pop Metal to New Wave of British Metal like Def Leppard. And Shock Rock which gave us Glam Metal and Industrial Metal and Hard Alternative most notably is Nine Inch Nails and Fear Factory to name two bands.
It has often been noted that most ballads are from Power Metal bands but not all. And thats not what Power Metal all is either, it can lend a sound to Symphonic Metal.
Progressive Metal ( or sometimes shorted too Prog Metal ) is a genre that many bands have created concept CDs where the entire musical arrangements tell a story. And is also influenced by jazz fusion and classical music. Taking points from progressive rock bands from 1960's to 1970's but Prog Metal is usually longer and more detailed. And it wasn't until the mid 80's with bands like Fates Warning, Queensrÿche and Dream Theater really broke out with their music. Making Progressive Metal a genre that would stand the test of time.
Early Metal gave us very many different genres including Original Hardcore and Early Punk derived from Early Metal have made way for Thrash Metal and the First Wave of Black Metal which gave us Death Metal and Grindcore, which made way for Metalcore and Norwegian Black Metal and Swedish Death Metal which all filters down into the New Wave of American Metal or NWOAM.