Hi All, Let’s touch on one of the many subtle issues around wireline logging and gamma logging in particular and it’s flow on effects. I have seen a few arguments on where to place the stratigraphic contact on a gamma log: above the peak, on the peak, below the peak, this then rapidly escalates to we need to get all the surfaces to snap to interpretations exactly! A solution for the problem might be as simple as “within the assay interval”.