In California, the main stylistic difference in Cabernet Sauvignon is between hillside/mountain vineyards and those on flatter terrain like valley floors or some areas of the Central Valley. In Napa, the hillside vineyards of Diamond Mountain District, Howell Mountain, Mt. Veeder, Spring Mountain District have thinner, less fertile soils which produces smaller berries with more intense flavors, reminiscent of Bordeaux wines that require years of aging to mature. The yields are also much lower, typically in the range of 1–2 tons per acre in contrast to the 4–8 tons that can be produced in the more fertile valley floors. Wines produced from mountainside vineyards tend to be characterized by deep inky colors and strong berry aromas. Throughout California there are many wine regions that have the potential to grow Cabernet Sauvignon to full ripeness and produce fruity, full-bodied wines with alcohol levels regularly above the Bordeaux average of 12–13%—often in excess of 14%.