Staying on the terroir track for today, I was alerted to an article in a local paper by a good reader of FERMENTATION. The article spoke to the formation of a new regional grape growing and winery alliance that is focusing on a swath of land that deserves focusing on for its special and unique climate. The "Petaluma Gap" might be a term you’ve heard of lately, particularly if you are an aficionado of Sonoma County wines. The Petaluma Gap…