[massons]

Riffs:
Soundgarden- Rusty Cage
Soundgarden- Outshined
Soundgarden- Jesus Christ Pose (pretty much the whole Badmotorfinger album is filled with great riffs)
Soundgarden- Spoonman
Soundgarden- 4th of July
Tool- Aenima
Led Zeppelin- Immigrant Song
Led Zeppelin- Kashmir
Deep Purple- Smoke on the Water
ACDC- Back in Black
Black Sabbath- Ironman

Solos:
Zeppelin - Stairway to Heaven
Soundgarden- Like Suicide
Pink Floyd- Comfortably Numb
Pink Floyd- Time
Queen- Bohemian Rhapsody
Guns N Roses- November Rain
Hendrix- Voodoo Child

all i can think of for now...