The territory of “Friuli Colli Orientali” DOC wines comprises three macro-typologies of soil of different origin:
- Alluvial deposits: these are native soils created by chemical changes (ferritization) in the upper part of mainly gravelly soils, transported and deposited by fluvio-glacial currents during the last Wurmian glacial period. The lithological substratum that gave rise to the ferritic soils largely consists of calcareous and calcareous-dolomitic material from the high basins of the rivers that transported, deposited and reshaped clastic material.
- Debris deposits (eluvio-colluvial): mainly the result of the processes of disintegration and alteration of marly-arenaceous flysch facies (alternating silty-clayey and sandy). The physical and chemical composition varies according to the percentage of the marly and arenaceous materials that constitute the rock of origin. The calcareous content ranges from 5% – 15% of the fine soil; the active calcareous content is more or less absent, as is the chlorosing power.
- Marly-arenaceous flysh: this type of soil of Eocene origin is characteristic of all the hilly areas of the designation, and consists of alternating marls (clays) and sandstone (sands). In the local area, this soil is known as “Ponca”.
The territory of “Friuli Colli Orientali” DOC wines comprises three macro-typologies of soil of different origin:
