The grunge boom hit in the early nineties,
originating in the Pacific Northwest,
with bands such as Mudhoney, Green River, and others fusing
raw punk with early Sabbath heaviness.
Many of the bands commonly associated with grunge are arguably not
really metal at all, though a few, such as
clearly were heavy enough to be part of a metal discussion.
, of course, is the band that most associate with
breaking the genre into the mainstream with their
release in 1991,
though their earlier Bleach
album is a far more metallic beast,
and closer to the early spirit of grunge.