Country of origin: United States Location: Atlanta, Georgia Status: Active Formed in: 2000 Genre: Progressive/Sludge Metal (early); Progressive Metal/Rock (later) Lyrical themes: Life, Hardships, Heroic tales, Mythical beasts, Literature, Spirituality Current label: Reprise Records Years active: 2000-present Officially formed on January 13th, 2000, a few days after Brann Dailor and Bill Kelliher had met the other members at a High on Fire show. Founded as a five-piece with Eric Saner on vocals, who left the band just before going on tour. The rest of the band members completed the tour sharing vocal duties, and eventually decided to continue as a four-piece. 要问近几年最走红的金属乐队是哪支？Mastodon（乳齿象，一种史前巨兽）绝对算得上一支。这是NWOAHM的一分子，但它绝对不是Metalcore，至今还没有一个词能确切的形容出他们的风格，也没有任何一个乐队和他们相似，前卫金属、泥浆金属、死亡、硬核、激流、试验音乐等多种成分融合其间，或许只能用“先锋金属”一词来形容它的风格。