Progressive bluegrass  From Wikipedia, the free encyclopedia
Jump to: navigation, search  Progressive bluegrass is a type of
bluegrass music which became popular in the 1960s and 1970s. The
four important elements (not always all present) of progressive
bluegrass are instrumentation (usually including electric
instruments, drums, piano, and more), songs imported or styles
imitated from other musical genres (like jazz, rock and others),
non-traditional chord progressions, and lengthy "jam band"-style
improvisation.  Bands such as Nickel Creek produce music in this
style.