Jazz fusion or jazz rock is a form of music that consists of the improvisation techniques of modern jazz music fused with the bass lines, styles of drumming, and instrumentation of rock music. The genre also sometimes melds funk and soul music elements with jazz as well. The genre also stresses electronic instruments and dance rhythms. In the 1960s some jazz musicians began using rock rhythms in some of their tunes. The 1970s soon became a breeding ground for jazz fusion acts, with musicians such as trumpeter Miles Davis, drummer Tony Williams, guitarist John McLaughlin, saxophonist Wayne Shorter, and keyboardists Herbie Hancock and Chick Corea emerging during this decade. The sounds of fusion bands of the early 1970s included the sporadic energy of John McLaughlin's Mahavishnu Orchestra, the African-music style of Davis' groups, the light and dancey music of Hancock's Headhunters and Corea's Return To Forever, and the electric funk of Shorter's Weather Report.