Always nervous about saying anything was "the first" because it often turns out that someone has done it before ... but this is the first isotopic palaeoclimate record that I know of from a gypsum speleothem.
Just spent a great couple of days @EarthSciCam chatting stalagmites with @DavidHodell and the Godwin Lab group. And honoured to have given a QDG seminar. Here's a mug shot.