The soils in this area are far from uniform in their composition and also far from being purely or even slightly volcanic. There are large expanses of various types of limestone clay or alluvial soils. As the vineyards of many producers are fragmented, how does one know (supposing that one is interested by the subject) whether such and such a wine comes from volcanic soils? And, if the wine is a a blend from grapes grown on some volcanic and some non-volcanic plots, does that wine qualify for the moniker « volcanic »? This seems to me to be at the crux of the question that has to be dealt with if the producers concerned want to establish some kind of identity chart.
Although, on account of previous engagements, I was unhappily unable to attend what seems to have been a very interesting day of lectures on the subject, the next day I spoke on site to a volcanologue, Patrick Marcel, who explained that volcanic soils can be of different natures: lava, basalt, pumice or mixed volcanic scree, thus revealing just a part of the complexity of this affair. He also explained that not all volcanoes form mountains, some just erupting more quietly, sending nevertheless a mass of molten sub-soil strata, often with a mixture of many different rock types, to the surface and which then spills over a surrounding area. It is not true to say therefore that all « volcanic » wines come from mountains, as one sometimes hears.
I would also add that the wines from most of the regions that were present at the fair and which I was able to taste are made with different grape varieties and under very varied climatic conditions, not to mention the age and condition of the plant matierial or even wine-making techniques. With all the above factors in mind, how can one generalise about the impact of such soils on all these wines? I would tend to say: Mission Impossible!
I visited with Patrick Marcel and a couple of young vignerons from Domaine Miolanne a former pumice stone quarry (see above ) that borders part of their vineyard and one can see the layers formed by successive eruptions; layers which contain here and there pockets of very different soil and rock types that were thrown up and out by different eruptions. The overall colour in this instance was shades of grey, not black, so one should not expect all volcanic soils to look like those in the first photograph. Jean-Baptiste Deroche, whose vineyard this is (with his wife), explained to me that one of the caracteristics of his vineyard that lies over this volcanc residue is its free draining, which resulted, in the very dry summer of 2019, in considerable stress and a very small crop. By contrast, he said, another plot of theirs on clay and limstone produced more and better. In other words, water, its retention or rather the lack of it, would seem to be a clear element in the « identity » of volcanic soils. Perhaps this factor can go some way to explain what some describe as salinity or « minerality » in many such wines?
One authority on the matter, a Canadian journalist called John Szabo, who has investigated the subject extensively, puts forward the theory that a high levels of potassium, or iron, in the wines on volcanic soils could be what defines them. In this case, I would ask the following question: is this level of potassium or of iron, whatever it may have to be, achieved simply by the nature of the soils, or by potassium-based and/or iron-based soil amendements such as are widely used in many limestone vineyards for example?
Whatever the conclusions of on-going investigations as to what might possibly define wines grown on volcanic soils may be, I very much appreciated this initiative taken by the very small and little-known appellation Côtes d’Auvergne to take the lead in this affair and also in showing wines not only from their region, but from many other places as well. Pierre Desprats, the dynamic President of this Vinora wine fair, together with all his team, should be congratulated.
Next week I will talk about some of the wines I tasted, and in particular those from the Auvergne. And there are many good ones, all at more than reasonable prices too.
David Cobbold
I enjoyed reading this David. Clearly this is a complex subject and very interesting in the present context when the four Upper Loire appellations – Saint=Pourçain, Côte Roannaise, Côtes de Forez and the Côtes de Forez have united for promotional purposes under the banner Loire Volcanique. I hope this initiative succeeds as there are some good wines being made in the Upper Loire and they deserve greater recognition.
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Yes Jim, I agree. I tasted quite a few good wines and the whole area deserves more attention. The debate as to what can or cannot be called « volcanic » is far from being closed, and, in a way, that does not matter in the first stages as this operation is aimed at gaining attention for these regions. But, if they want to be rigourous in their approach, they will have to go further in some form of a « cahier des charges » and this will not be simple in many cases. Just saying that there is a volcano 50 kilometres from your plot is NOT sufficient to say that your wine is « volcanic », even if ashes can cover quite a distance!
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David. We will see if they go for a cahier des charges or just concentrate on promotion under the volcanic banner. It is only a selection of producers that have signed up for this new organisation. They have an event in Paris on 27th April. Unfortunately I can’t go because it is during the Decanter World Wine Awards.
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I will try to make it there Jim and do an article from that.
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The alternative is 9th March in the Côte Roannaise but I guess Paris will be more convenient. I thought abut going to the Roannaise as we are in Touraine then but a 600 km round trip is too much to consider.
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Consacrer les 4/5ème d’un billet à dire qu’on est plein de suspicion vis-à-vis de l’effet terroir(s) des substrats volcaniques sur les vins, on s’en serait passé, David. Cela tombait tous le sens, s’agissant de vous, voyons…
Il eut mieux valu approfondir la démarche et louer l’initiative de ces vignerons qui ont trouvé là le moyen de mettre leurs vins en lumière et de les faire connaître en dehors de la région Auvergne au sens très large de ce terme (je n’ai pas pu y aller, hélas). Le reste, c’est du chipotage, de l’écorniflage destiné à se maintenir droit dans sa ligne de pensée (je dirais : to snoop…).
Les Côtes du Forez, tout à fait à l’est, renferment des pépites remarquables ; la maison Mondon-Demeure (Pic et Vin à Boisset-Saint-Priest) a conservé des hybrides producteurs directs (Seibel, Bacco) et ils cisèlent leurs Vendanges : 20 cuvées pour 8 ha de vignes (sur basalte, éboulis de basalte, etc…avec, outre ces hybrides, du Gamay, du Gamay à jus rouge, du Viognier…un festival !!
Parlez-nous des vins, bon sang, puisque vous n’avez rien à dire au sujet des terroirs, et cela sera non seulement suffisant mais très instructif. Et vous savez parfaitement le faire, David. Régalez-nous de vos commentaires de dégustation!
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Bonjour David,
bravo pour l’article. effectivement le terme volcanique est mal venu mais ok pour le marketing. Les nuances « volcaniques sont nombreuses » et il serait bon que certains vignerons étudient bien leurs sous-sols avant d’argumenter. Certaines roches n’ont pas d’expression aromatique ou sapide. De mon côté j’ai fait ce type de dégustation avec des vins issus de roche noirâtre de basalte, comme La Volcanique de chez Verdier-Logel, à déguster au moins une fois dans sa vie, où le gamay devient volumineux et charpenté (hors vinif), normal car le basalte développe les mêmes arguments que l’argile ou les schistes argileux, avec en plus un caractère fumé bien caractéristique. Ce fumé basaltique (ou de lave) est différent de celui du silex, des marnes et des schistes. Il est grand temps d’arrêter le terme « pierre à fusil » !
J’avais pris des fragments de roche (assez volumineux en plus) pour réaliser la dégustation comparative. C’est exactement la même sensation. Comment l’expliquer ces odeurs naturelles et celles du vin, en soi molécules organiques typiques d’un minéral ? par une analyse labo (chromato HPLC et autres) mais personne ne s’y intéresse visiblement. C’est surtout cela qui n’est pas normal. Ou plutôt si, car les roches n’ont pas de produits à vendre !
Merci pour le post et continuer vos prises de position, car elles appellent à la réflexion et à l’échange, ce qui devient de plus en plus rare.
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Je me rappelle d’une dégustation de Châteaumeillant où on m’avait expliqué que les cépages plantés (pinot noir et gamay, si a mémoire est bonne) varient avec les sols, une partie de l’aire d’appellation d’origine volcanique. Je n’ai plus les détails malheureusement.
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