WAT IS A SOLERA?
The bottom layer, the solera, contains the oldest wine. The layers above, the criaderas, always contain slightly younger wine. When a new supply of bottles is needed, sherry is bottled from the bottom layer of the barrel. The lower barrel is then refilled with wine from the barrel on top of it, and that, in turn, from the layer above it. The process goes on up to the upper barrels. Every year, fresh wine from the last harvest is added to the upper barrels. In the solera system, therefore, the young wine, step by step, assumes the characteristics of the more mature wines. As a result, no harvest year is stated on sherries.
NAME OF A UNIQUE BARREL SYSTEM IN WHICH SHERRY MATURES.