PRIMARY HEAVY METAL GENRES
1.1 Black metal
1.2 Death metal
1.3 Doom metal
1.4 Drone metal
1.5 Folk metal
1.6 Glam metal
1.7 Gothic metal
1.8 Groove metal
1.9 Industrial metal
1.10 Metalcore
1.11 Neo-classical metal
1.12 Nu metal
1.13 Post-metal
1.14 Power metal
1.15 Progressive metal
1.16 Sludge metal
1.17 Speed metal
1.18 Stoner metal
1.19 Thrash metal
CROSS GENRES WITHIN HEAVY METAL
2.1 Alternative metal
2.2 Avant-garde metal
2.3 Christian metal
2.4 Extreme metal
2.5 Rap metal
2.6 Symphonic metal
2.7 Viking metal