According to the Veneto soils map provided by ARPAV (Regional Agency for Environmental Prevention and Protection of Veneto), there are different macro-categories of soils in Valpolicella, which are related to various morphological, lithological and bioclimatic features.
RIVER ALLUVIAL DEBRIS
Alluvial deposits formed by Lessini’s streams, running towards the lowland along the main valleys. The coarse deposits have variable gravel quantities, a medium texture rich in the calcareous skeleton. Other soil features are the following: moderate soil depth; good drainage capacity. Active limestone: 3-10%.
The soil made up of white and white-pink marly limestone (i.e. Biancone and Scaglia Rossa) is typical of the Valpolicella hilly areas. The hills have undergone intense erosive phenomena, that reshaped the surface, so there is a moderate soil depth, a medium or moderately fine texture, a high limestone content, and a good drainage capacity. Active limestone: 10-20%.
Volcanic sediments can be found in the hills, where the soil is also rich in limestone content. These basalt outcrops are the result of underwater volcanic eruptions, with the intrusion of volcanic deposits into the carbonate platform. These conditions have produced the coexistence of limestone and volcanic rocks and so the various types of soil.
This soil is clayey on the top, has a course composition going deeper into the ground and a low content of active limestone (0-3%). There is a substrate layer of about 60-100 cm consisting of basaltic rocks. Moderate soil depth and good drainage capacity.