In reply to duncan:
I gather those Emo skinny trousers are normally worn with a studded or spiked belt, a pretentious asymmetrical haircut, and a gaze of apathetic angst on the face of the wearer, none of which applied to us I hope!
The jeans worn in those days had a tendency to shrink and those in the photos are simply a result of pioneering Deep Water Soloing!
Bob Dylan's drainpipe trousers could explain the high notes on some of his earlier songs (On Desolation Row he sings about "sniffing drainpipes"). But did you notice his shoes? - also historic climbing gear - as worn by Al Harris on Zukator ("anything Crew can climb I can second in winklepickers").