Certified Sommelier Practice Exam

What is characteristic of the soils in Chateauneuf-de-Pape?

1. Volcanic ash and clay

2. Alluvial deposits and pudding stones

3. Granite and quartz

4. Basalt and sandstone

The correct answer is: Alluvial deposits and pudding stones

Châteauneuf-du-Pape is renowned for its distinctive soil composition, which plays a crucial role in the quality and character of its wines. The region's soils are primarily composed of alluvial deposits combined with "galets roulés," or pudding stones. These large, rounded stones are essentially smooth pebbles that have been weathered over time and are embedded within a clay and sand matrix. The presence of these pudding stones is particularly important because they have a high thermal mass, allowing them to absorb heat during the day and radiate it at night. This helps to create a warmer microclimate around the vines, which is particularly beneficial in the cooler evenings of the region. The diverse composition of the soil, including clay, sand, and limestone, also contributes to the drainage and water retention needed for grapevines to thrive, allowing them to develop full flavors and complexity. Other options such as volcanic ash, granite, quartz, basalt, and sandstone do not accurately reflect the primary soil types found in Châteauneuf-du-Pape. Understanding the significance of alluvial and pudding stone soils in this region is essential for appreciating the unique wines it produces, making this the correct answer.