Winery Tourism Practice Exam

Gravel soils define the Left Bank Bordeaux terroir. These gravel beds, layered over mineral subsoil, come from glacial and alluvial deposits along the Gironde and provide excellent drainage while also warming up quickly in the sun. That combination helps Cabernet Sauvignon vines ripen more fully in a cool, maritime climate, producing wines with strong structure, firm tannins, and good aging potential—traits that are characteristic of Left Bank blends from areas like Médoc and Graves. In contrast, sandy soils drain too quickly and often yield lighter wines, clay-rich soils hold water and can slow ripening, and loam, while versatile, isn’t the defining soil signature of this region.