If I understand the question correctly, there is a term from a zillion (well, 46) years ago, called "Dunlap", that seems to describe this unambiguously. It appeared in Clark Baker's Challenge Square Dancing Handbook in 1978. page 79. It was described for an hourglass, but it would apply equally well for diamond or general 1/4 tag setups. The two 8-person setups are effectively on top of each other, perpendicularly and working independently.
While the word "phantom" could possibly enter into peoples' minds
while doing this, the fact that there has been so much discussion
here of the correct term suggests that that word is not
unambiguous. The word "phantom" is WAY overused, having subtly
different meanings in such things as "split phantom lines" and the
notion of "C1 phantoms".
Hi all,
From an "I" or bone formation, Coop wanted us to perceive a setup of 2 overlapped 8-dancer phantom formations, either a 1/4 tag or diamonds. What terminology would you like us to use for this? "Overlapped" seems like a relevant word, but "overlapped diamonds" already means something else.
Sue