From waves or two faced lines: Centers Crossrun, new centers Cast off 3/4 while the new ends move up a quarter. Right hand waves change to left hand waves and vice versa; two faced lines remain two faced lines. (author unknown)
COMMENT: Call directionally as Centers Crossrun then Fan the Top.
From parallel waves or two faced lines: Centers Crossrun and Circulate one position while the new centers arm turn 3/4. Finishes in twin diamond formation (two faced lines end in regular diamonds; waves end in facing diamonds). (author unknown)
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.