What sort of rope would be ideal for glacier travel? I have a 10mm 60m rope, but this is quite heavy. Would a 9mm 50m rope be suitable for a team of three, crossing glaciers in the Swiss Alps?
Beal Ropes has a guide that covers this. Read the page but two images for quick reference:
A robust half rope such as the Mammut Genesis is probably a very good choice; such a rope is much lighter than a 10mm Single but still has a thick sheath.