What distinguishes the terroir of the Coonawarra region?

The distinction of the terroir of the Coonawarra region is primarily defined by its unique terra rossa soil and the significance of its old vines. The term "terroir" refers to the combination of environmental factors and soil types that influence the character of the wine produced in a specific area.

In Coonawarra, the terra rossa soil, characterized by its rich red color and high clay content, sits over limestone subsoil, which contributes to excellent drainage and provides essential nutrients for the vines. This soil is particularly beneficial for growing high-quality grape varieties, especially Cabernet Sauvignon, which the region is renowned for.

Additionally, the presence of old vines in Coonawarra adds complexity and depth to the wines. Older vines often produce lower yields of fruit with more concentrated flavors, contributing to the distinctive quality of the wines from this region. Therefore, the combination of terra rossa soil and mature vineyards is what sets Coonawarra apart when discussing its terroir.