Hardcore (77-84)
is a subgenre of punk rock that originated in North America . The new sound was generally thicker, heavier and faster than earlier punk rock.The songs are usually short, fast, and loud.(discharge, exploited)
Metal core (or crossover trash 84-88)
is an umbrella term used to describe fusion genres that incorporate elements of the hardcore punk and heavy metal genres.(agnoxtc front, cro mag)
Metallic Hardcore (89-2000)
new wave of metalcore (biohazard, integrity)
Melodic Metalcore (since 97)
third wave,(buller for my valentine in flames, sevenfold)