I agree Gravity_Ray,
Our oerceptions have changed enormously. I am not surprised to find Sulphur Dioxide on the Moon, in fact I expect it, as the Moon did have active volcanism, many volcanoes still visible on the moon, extinct, but still there. The Marius Hills being a cluster of small shields, Mons Rumker being a multi vent shield, Valentine Dome, Ina D Caldera (possibly active now, venting, not erupting lava, though recently LRO LROC has shown it to be not 'so young'), etc.
But seeing it in a hydrated form IS a huge surprise. That is for sure. That would imply on the face of it geysers, but geysers could NOT have existed on the Moon, as the lack of atmosphere would boil any liquid H2O away instantly!!! I suppose hydrated fumeroles may have been possible???
Further research is going to be required.
Andrew Brown.