Sludge Metal

Less an "official" genre than a particular term with some acceptance, sludge metal is characterized by crushingly heavy riffing (often more distorted than normal, even for metal), with hardcore-ish vocals the norm. No one band is really considered a founder of the style, but one geographic area dominates the field, and that is New Orleans, as many of the top bands (Crowbar, Eyehategod, and Soilent Green, to name three) hail from that city.

Acid Bath	Graveyard Rodeo	Soilent Green
Acid Witch	Greenmachine	Sourvein
Archie Bunker	Grief	Subrosa
Baroness	Iron Monkey	Teeth Of The Hydra
Bison B.C.	Kalas	Teeth Of Lions Rule The Divine
Blindead	Kingdom Of Sorrow	Tombs
Buzzov.en	Kongh	Tungsten
Coffins	Melvins	Unearthly Trance
Crowbar	Nailbomb	Valume Nob
Down	Rwake	Zoroaster
Eyehategod	Slime In The Current