You do not taste shale in wine grown on shale. You taste the compounds the vine has synthesized when it is grown on shale. Why is this so difficult to understand?
A Niagara winemaker made very clear to me that you need good healthy soil to make good wine, but that doesn’t mean that what is in the soil literally goes into the wine itself. Some minute trades of minerals do get in there, I was told, but we’re not talking bottled mineral water levels which I underdtand are actually artificially elevated with added mineral salts.