Hello. Some of you who know me know I am a big Metallica fan, and I am learning more about melodies and harmonies, and towards the beginning of Orion, after Cliff's 3 chords being played over and over, which are harmonies, the guitars play root notes with flat minor thirds, minor thirds, and major thirds. While the guitars are doing that, Cliff is playing just single notes, so would that mean there is no melody to this part of the song.