!!!I AM NOT AN EXPERT IN THE MICROBIOLOGICAL SCIENCES!!!
With that said, though, do those pale lily pad looking rafts more closely resemble cold congealed fat or a typical yeast raft? If they're fatty looking, you may have cultured something besides a yeast.
Not that it isn't worth pursuing, especially if it doesn't smell bad, but it might be closer to a sour than a straight up ale.
But I guess you were hoping for something unique anyway.