Features common in Jazz-Rock, Jazz-Funk Fusion of the late 60s, early 70s:
Rhythm:
Rock or funk rhythms (replaced swing rhythm)
Form:
Simpler chord progressions; slow harmonic change; long vamps (ostinato)
Improvisation:
More "inside" playing than free jazz
Instruments: electric and electronic
Electric bass guitar; electric guitar; electric keyboards (synthesizers)
Greater use of soprano saxophone
Timbre:
Use of electronic effects; distortion; feedback
Upper instrumental range emphasized
Blue note effects in funk styles
High volume

Musicians:
Miles Davis
Tony Williams (Lifetime)
John McLaughlin (Mahavishnu Orchestra)
Herbie Hancock (Headhunters)
Chick Corea (Return to Forever)
Wayne Shorter and Josef Zawinul (Weather Report)
Pat Metheny