Spanish name (also Solera-Criadera system) for the traditional storage and blending system of younger and older wines in the production of sherry. The process is also used alternatively in the production of Madeira, Malaga, brandies(brandy, whisky, etc.) and vinegar (wine vinegar). The name is derived from the lowest row of barrels (Solera = "lying on the ground"). From the lowest row of barrels a part of the finished or matured sherry is taken for marketing each year. From bottom to top, the removal (Saca) and refilling (Rocío) from the row above takes place.