Avant-prog is an umbrella term that encompasses avant-garde progressive rock. As a style, it appeared in the early to late 1970s as the extension of three separate progressive rock sub-styles: Rock in Opposition (RIO), the Canterbury scene, and the band Magma's signature style known as Zeuhl.
This article relies largely or entirely on a single source. (April 2015)
|Cultural origins||Early 1970s; United States, Europe, and Japan|