Any feedlots of dairy cattle around that are being fed molasses? Bees have been known to bring that into the hives. I wish it wasn't such a pain to get things shipped across the line so I could get a sample shipped to me so I could look at it under the microscope, check the optical density, moisture, do a pile test, and taste it. then I would offer an opinion of what it could be.
Do you have a video camera and post to YouTube Jack?