In general, soils are deep, and although most of the roots are within the first meter deep, it is the roots that go a few meters deep that ensure water needs are met during drought.
These soils, colloquially known as "Royal", are related to wines which are rich in extracts, they foster water reserves and add tannins and consistency to the grape. Wines with a high alcohol content and a great chromatic intensity.
The "gravel" can have a high quantity of pebbles mixed with clay soils, which fosters the growth of the vine because it presents excellent drainage and permeability. They can produce wines with high alcohol content but if you harvest a bit earlier they are usually fresh and fruity.
Also know as "Calar", they are whitish in color because of the high content in Calcium Carbonate and gypsum. These wines are perfect for Crianza (Aging) and will present great personality, a round body and a mineral touch in their aroma. Wines with finesse, not high in alcohol content and with a good bouquet.