Good question, Gramps.
I've been looking at that possibility especially with the vug pics
on the end of the fieldtrip report. Both Cinnabar and Realgar
form in hydro thermal veins commonly associated with
hot spring environments, which would fit the Glendon locale.
But I have found no association with fluorite.
Quartz, calcite, and barite, yes.
So far, everything comes back to Hematite as best guess,
but I am still looking at other possibilities. Especially with
the possibility of the bright red translucent crystals in the
last two pics of the fieldtrip report being Realgar or Cinnabar?
I don't know if either has ever been reported from Glendon?
Joe