OK, Henri, I missed this when you first posted this, but I'd sure support your idea that anyone familiar with this issue should come to Texas and make a presentation. I hadn't been aware of this problem, but I can't imagine that some of the radon professionals in the field haven't already been involved. It would be good for paleontological curators to be able to attend Symposium to pick some of the brains of the most expert mitigators in the business.
I note the article you cited gives the reference here that describes the geochemistry of what's happened: https://www.sciencedirect.com/science/article/abs/pii/S0045653521019160?via%3Dihub
Amazing.