Our estate has its geological origins in the late tertiary (Miocene) and early quaternary periods, and is calcareous in nature. The time and the way in which sediments were deposited and subsequent tectonic shifts have shaped our landscape. In the Miocene period it lay beneath a shallow sea which exercised little pressure. Different types of soils originate from this period: clay over the material known locally as galera (compact clays with a polyhedral structure), sand over galera, clay over a limey, sandy subsoil with large numbers of calcareous nodules, and finally silty clay soil over a highly compact calcareous subsoil with large numbers of fossil remains of seashells. In the quaternary period the sea began to retreat. From this period we have silty, sandy soils over molasse (soft, calcareous clay bedrock), soils of fluvial origin with large numbers of rounded pebbles and colluvial soils formed by erosion. The texture (proportions of clay, silt and sand) of our soils is essential when determining the potential water reserves of each plot: clays increase them, while sands and stones reduce them, but we always depend on the depth of the soil and the ability of the roots to exploit this soil. At Raventós i Blanc, all the plots on the estate have good water reserves due to the depth of the soils and their clay content. Our studies have confirmed our ancestors' choice: the soil is ideal for producing white wines.