Why does Chablis taste nothing like Meursault, when both are made from Chardonnay? Why is a Morgon so different from a Fleurie, when both are Gamay planted just 20 kilometres apart?
The answer comes down to one word: terroir.
It is one of the most used — and most misunderstood — concepts in the world of wine. At Le Petit Musée du Vin, visitors can touch the different soils with their own hands. Here is a clear explanation of why the earth beneath your feet ends up in your glass.
Terroir is far more than just soil
The word “terroir” encompasses several factors:
- The soil: its geological nature (granite, clay, limestone, schist, sand…)
- The subsoil: the bedrock and its capacity to drain or retain water
- The climate: temperatures, rainfall, sunshine, temperature range between day and night
- The aspect: the orientation of the vineyard (south-facing = more sun = riper grapes)
- The microclimate: the effect of a hill, a forest or a river on local temperatures
It is the interaction of all these factors that creates the unique personality of a wine.
The main types of wine-growing soils
Granite — the soil of Beaujolais and Alsace
Granite is a crystalline rock, poor in nutrients and well-draining. The vine suffers (slightly) and yields little — but what it produces is concentrated and expressive.
Wines from granite tend to be mineral, fresh, with fine acidity and very pure aromatic expression. The Beaujolais crus (Morgon, Fleurie, Moulin-à-Vent) are the perfect illustration.
In our “The Vine” room, you can hold a block of Beaujolais granite and feel its crystalline texture between your fingers.
Limestone — the soil of Burgundy and Champagne
Limestone is the bedrock of great white wines. Well-draining but capable of retaining water deep down, it forces the vine to develop deep roots — giving the wine great mineral complexity.
Wines from limestone are often more structured, with pronounced acidity and a characteristic chalky minerality. Think Chablis, Meursault and Champagne.
Clay — the soil of powerful wines
Clay retains water and heat. The vine produces larger, riper grapes with more present tannins.
Wines from clay are often fuller-bodied, warmer and richer in alcohol. Some Pomerol (Saint-Émilion) and Côtes du Rhône wines are good examples.
Schist — the soil of wines built for ageing
Schist is a laminated rock, poor and well-draining. It absorbs the sun’s warmth during the day and releases it at night — creating a temperature variation favourable to grape ripeness.
Wines from schist often have a ferrous, “slaty” character, with silky tannins. Maury, Banyuls and certain Loire Valley wines (Muscadet Sèvre-et-Maine) all bear witness to this.
Beaujolais: an open-air laboratory
The Beaujolais is one of the most fascinating wine regions for understanding the impact of terroir. Why? Because a single grape variety (Gamay) is planted on radically different soils within the space of just a few kilometres.
| Cru | Dominant soil | Wine profile |
|---|---|---|
| Fleurie | Pink granite | Light, floral, elegant |
| Morgon | Decomposed volcanic rock | Structured, deep, long-lived |
| Moulin-à-Vent | Granite + manganese | Powerful, tannic, cellaring potential |
| Chiroubles | Pure granite | The lightest, most delicate |
| Saint-Amour | Granite + schist | Fruity, supple, approachable |
It is fascinating: same vine, same grape variety, same techniques — and yet completely different wines. The only variable: the soil.
Come and touch the terroirs at the museum
In our “The Vine” room, you can touch and compare samples of granite, clay, limestone and schist — the four great types of French wine-growing soil — directly with your hands. Each has a unique texture, colour and “feel”.
And in our tasting room, you can compare side by side wines from these different terroirs: theory becomes immediately sensory.
To go further: the article on the history of Gamay shows how this grape variety expresses radically different terroirs across the Beaujolais. If you are interested in farming practices that respect the terroir, our guide to organic, biodynamic and natural wine untangles the labels. The full details of the museum visit are described on the museum page — and check the practical information to book your visit.
3 rue Passet, Lyon 7th · Thursday to Sunday · £25 / person