See Verdicchio part 1 - in the laboratory for the background to these vertical tastings of Bucci and San Lorenzo and Verdicchio part 3 - left v right bank  for a more detailed discussion of the Verdicchio dei Castelli di Jesi subregions.  BUCCI That Verdicchio can age considerably is in itself not a miracle. The grape variety is able to retain its acidity under hot growing conditions, and in the past it was partially or wholly fermented on the skins. This added a little tannin, which, in turn, helped to preserve the wine. The soils it grows on, especially on the hillsides, are limestone and rich in minerals, factors...