Crossover thrash (or crossover) is a face-melting combination of thrash metal and hardcore punk. It was started in the 80's by bands such as Dirty Rotten Imbeciles, Stormtroopers of Death, and Corrosion of Conformity.
Crossover is scorchingly fast, with simple metallic riffs and more punk-influenced vocals. It is more punky than typical thrash metal, but it is more metallic than most hardcore punk (outside of grindcore).
Crossover Thrash is similar to Metalcore, but there are differences. Crossover is faster,
punkier, and overall not as heavy, with shouted vocals; while metalcore is more mid-tempo and heavier, with screamed or growled vocals.
Bands include: Dirty Rotten Imbeciles, Corrosion of Conformity, Stormtroopers of Death, Suicidal Tendencies, and What Happens Next?