again these are jusr words to describe sounds so that we can better communicate w/each other as musicians. You should train your ear to recognize these sounds, just remember that all chords come from scales

TONALITIE............CHORD..............SCALE
major................Cmaj...........Maj/lydian
minor...............Cmin (C-)....Dorian,Phrygian,Aeolian
Dominant..............C7..............Mixolydian
Diminished..........Cdim7............Diminished
augmented..........Caug (C+)..........wholetone

to answer your questions;
Zeppelin - yes
Dev - What tonality do you want to use? The choice is yours
Depending on the tonality of the riff would determine what type of chord to play.

[Edited by chris mood on 10-17-2001 at 01:22 PM]