Terra Rossa (soil)

Terra Rossa (soil)

Terra rossa ( Italian for "red soil") is a type of red clay soil produced by the weathering of limestone. When limestone weathers, the clay contained in the rocks is left behind, along with any other non-soluble rock material. Under oxidizing conditions, when the soils are above the water table, iron oxide (rust) forms in the clay. This gives it a characteristic red to orange colour.

Terra rossa is typically found in regions with a Mediterranean climate but can also be seen elsewhere, for example in Prince Edward Island, Canada.

Compared to most clay soils, terra rossa has surprisingly good drainage characteristics. This makes it a popular soil type for wine production. Among other wine regions, it is found in La Mancha in Spain and Coonawarra in Australia.