I bought a dozen half bottles of this 1990 Domaine de Marcoux when it was first released. The bottles I had in the early to mid-2000s were among the best Chateauneufs I have ever tasted--just bursting with energy and intensity as well as very deep fruit. With hindsight, I should have finished off all of the bottles within the next few months, but it's easy to assume that a great wine will only get better. This bottle tonight no longer qualifies as great but it is very good.
The color has lightened, and there is a substantial crust of sediment on one side of the bottle, which has been undisturbed for at least a decade. Smells and flavors are what I expect from an older Chateauneuf du Pape--dried and fresh cherries, savory spice and sea salt. Strong presence on the palate. There is nothing wrong with this wine except for my memory of the greatness it offered a decade ago.