THRASH METAL generally features fast tempos, low-register, complex guitar riffs, high-register guitar solos and double bass drumming. Thrash metal rhythm guitar parts are often palm-muted to create a tighter and more precise sound. Palm-muted parts are often played with a “crunch” distortion guitar tone. Vocally, thrash metal can employ anything from melodic singing to shouted vocals. Most thrash guitar solos are played at high speed.

In Europe, the earliest band of the emerging thrash movement formed in 1979, which was Venom from Newcastle Upon Tyne, Great Britain. Along with German metal exports Accept, motivated musicians from central Europe to start bands of their own, eventually producing German thrash exports such as Sodom, Kreator and Destruction as well as Polish’s Acid Drinkers, Turbo or Empatic. Here is the list of 10 best Polish thrash metal bands of all time.
(SOURCE: WIKI – http://en.wikipedia.org/wiki/Thrash_metal)