Also C Major (Ionian), D Dorian
G Mixolydian: G A B C D E F. Formula 1 2 3 4 5 6 ♭7. Same notes as C Major (Ionian), D Dorian, E Phrygian. A major mode with a flat 7th: the sound of the dominant chord, of blues-rock riffs and of much folk and Celtic music.