Roumier owns two roughly equally-sized parcels of Bonnes-Mares - one in the “Terres Blanches” towards the top of Bonnes Mares on chalky marl soils rich in fossilized seashells, and one in the “Terres Rouges” section towards the bottom of the slope with more clay. The two parcels are vinified and aged separately, and then blended before bottling. The Terres Blanches gives the final blend its soaring aromatics and minerality, while the Terres Rouges provides backbone and depth.