I was wondering if this ending chord progression to Led Zeppelin's "The Rain Song" could be viewed as a cadence.
"The Rain Song" uses a very interesting guitar tuning (D-G-C-G-C-D). The notes also look a little off on the picture. The second-to-last measure is A-G-D-D-D-G-D-D, and the final measure is the Gsus2 chord (G-D-A-D).
The song is in the key of G Major. It ends with two chords, the Am7(add11, no 3, no 5) [I'm not sure if that's the best way to analyze this chord] and the Gsus2.
If this followed the guidelines from my theory textbook, it would be a plagal cadence since the first chord doesn't contain the leading tone in the key of G, and the second chord is the tonic (although it is a suspended chord).
Do you think this can be considered a cadence? Or is it better viewed as something else like a short chord progression?
Thanks in advance!