From the Kermit Lynch website:
Haut de Carco:
The Haut de Carco is the most recently planted parcel, sitting directly above the Carco, and containing even harder, thicker limestone than the Carco. In fact, nothing grew there before. The Arenas cleared rocks and blasted holes for over a year in the rock to plant Vermentinu (much to the awe of their neighbors who were convinced that the vines would never take). The first harvest was in 2008.
• Hand harvested (yields usually around 40 hl/ha)
• Natural fermentation, low doses of sulfur, cement cuve, no wood
• Long fermentations, then wines are aged for 6 to 8 months on fine lees in stainless steel tanks
• Wines complete malolactic fermentation
• Most vintages are bottled unfiltered