Lieu-dit · La Salle
Les Thorains
Les Thorains is a lieu-dit in La Salle, Mâconnais, Burgundy, whose largest tier is regional.
4.95 ha
delimited
241 m
elevation
10.5 h
sun at harvest
Open on the mapWith the boundary, the plots, the sun through the year and the bedrock.
In figures
| Level | Regionalinao-aoc-viticoles-bulk (c. 4 September 2026) |
|---|---|
| Village | La Salle |
| Region | Mâconnais, Burgundy |
| Delimited | 4.95 hainao-aoc-viticoles-bulk (c. 4 September 2026) · cadastre-etalab (4 September 2026) |
| Planted | 3.21 hacadastre-etalab (4 September 2026) · ign-bdtopo-vigne (5 September 2026) · ign-rpg-2024 (5 September 2026) |
| Parcels | 17 |
| Grape variety | chardonnay also permitted: aligoté, pinot blanc, pinot gris, melon, sacyinao-cahiers-des-charges (7 September 2026) · dgddi-superficies-produits (7 September 2026) · franceagrimer-observatoire-viticulture (7 September 2026) |
| Organic | 31%agence-bio-cartobio (c. 5 September 2026) · agence-bio-operateurs (5 September 2026) |
Place in the village
Among the 5 named plots ranked regional in La Salle, from high to low:
Position
241 m
elevation
15.2%
steep
ESE
east-southeast
shoulder
concave fold
| Elevation | 241 m 224 to 251 mign-rge-alti (5 September 2026) |
|---|---|
| Daytime temperature | −0.20 °C by day, relative to the village centre at 214 m, ± 0.03 °Cmeteo-france-quotidiennes (18 September 2026) · meteo-france-postes (6 September 2026) · meteo-france-lsh (6 September 2026) · ign-rge-alti (5 September 2026) |
| Slope | 15.2% 8.6°ign-rge-alti (5 September 2026) |
| Aspect | east-southeast 110°ign-rge-alti (5 September 2026) |
| On the slope | 83% shoulder, in a concave hollow, 91 m drains onto itign-rge-alti (5 September 2026) |
Bedrock
- 4%Heterogeneous slope deposits (colluvium and scree) jonger dan circa 0,13 (laat-Pleistoceen tot Holoceen)
- 38%Oolitic limestone, marl and chailles (late Bathonian to Callovian) 165.5–161.5 million years
- 9%Massive Bathonian limestone, dolomitic top 166.5–165.3 million years
- 26%Aalenian crinoidal limestone and iron oolite 175–169 million years
- 24%j4-5 age unknown · hatched, outside the column
Marnes jaunâtres à oolithes ferrugineuses et argiles noires à fossiles pyriteux (Callovien à Oxfordien inf.)
Not a borehole: ordered by age, thickness by share of surface.
In the glass. Plots where the decalcified clay with chailles dominates are often described as fresher and firmer. This is an observation from practice, probably via the lower pH and the stony top layer, not a measured relationship. (weak indication)
A mixed sequence of oolitic limestone, marl bands and chailles, siliceous nodules that grew in the lime mud during hardening. Chailles resemble flint but are less pure and more porous, with more lime in the siliceous mass. Where the limestone has dissolved at the surface, a decalcified clay remains in which the insoluble chailles lie loose; about 165.5 to 161.5 million years old.
For the vine. Mixed behaviour: the oolite drains readily, the marl bands retain water and the chailles form a stony, fast-warming top layer. Where the decalcified clay with chailles dominates, the soil is more acidic and poorer in active lime, which lowers the chlorosis risk. Rooting depth varies greatly over a few metres, depending on where a marl band lies.
Occurs on the plateaus and upper slopes of the Côte and in the Hautes-Côtes, where the decalcified clay with chailles lies at the surface.
BRGM geological map at 1:50,000. It tells vineyards apart, not plots within a vineyard. The link between rock and taste is indirect: soil depth, water and warmth do the work, and slope, vine age and the cellar do the rest. Units on that map: j3c-4, j1-2a, j4-5, j3c, Ch.
brgm-bdcharm50 (4 September 2026)Sun and horizon
07:44
above the hill
18:12
behind the hill
10.5 h
sun at harvest
1.0 h
lost to the hill
Grey: sun up, behind the hill or its own slope.
Around harvest the sun rises here at 07:44 above the hill and disappears at 18:12 behind the hill: 10.5 hours of direct sun on a clear day. The ridge reaches 17.2° above the horizon to the west-northwest. The relief costs 0.7% of the irradiation from April to October, direct and diffuse together.
| Irradiation | +0.1% versus flat land 1,071 kWh/m² from April to October, 39% of it diffuseunder the average cloudiness of 2005 to 2023 (PVGIS-SARAH3, EU JRC); direct, diffuse and reflected light togetherign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026) · jrc-pvgis-sarah3 (10 September 2026) |
|---|---|
| Open sky | 97.4% of the sky the slope itself sees; the surrounding relief blocks the restign-rge-alti (5 September 2026) · ign-lidarhd-mnh (6 September 2026) · ign-bdforet-v2 (5 September 2026) |
Three reference days, the caveat
| rise | set | sun | day | |
|---|---|---|---|---|
| 21 June | 06:34 | 19:52 | 13.3 h | 15.8 h |
| 20 September | 07:44 | 18:12 | 10.5 h | 12.3 h |
| 21 December | 08:54 | 15:16 | 6.4 h | 8.6 h |
Computed from the IGN elevation model at 5 m: horizon in 36 directions up to six kilometres, sun position per minute, angle of incidence on the mean slope. Clear sky, with the tree canopy from the IGN forest inventory as a raised horizon (15 m closed forest, 5 m heath, trees within 60 m ignored), 29% of the far field is forest (BD Forêt), no buildings.
The irradiation loss does include clouds: the average of 2005 to 2023 (PVGIS-SARAH3, EU JRC), not any particular year.
Air and cold
42 m
above the lowest point
drains far away
cold air
a gully
8.1 ha flows past
| Cold air | 42 m high on the slope, cold air drains far awayign-rge-alti (5 September 2026) |
|---|---|
| Cold air passing through | 8.1 ha a gully, mean over the polygon 0.27 haign-rge-alti (5 September 2026) |
Planting
ESE-WNW
down the slope
1.39 m
between the rows
63%
vineyard in 1950
| Rows | ESE-WNW (104°) down the slope (6°), every 1.39 m, all rows parallelmeasured over 3.1 of 3.2 ha plantedign-bdortho (6 September 2026) |
|---|---|
| Vineyard in 1950 | 63% abandoned since: 1.04 ha, planted since: 1.55 haassessed over 4.2 ha on the 1950-1965 aerial photographign-photos-historiques-1950-1965 (6 September 2026) |
Climate over time
station MACON, 219 m, 13.8 km away
growing season, April to October: 1951-1980: 15.4 °C, 1991-2020: 17.1 °C
Huglin index: 1951-1980: 1,718, 1991-2020: 2,022
last spring frost: 1951-1980: day 96, 1991-2020: day 85
series homogenised through 2022
Who owns land here
2.30 ha of 4.95 ha delimited is registered to a legal entity
- LES ERABLES DE MONTPELLIER31%
- SOCIETE DES CARRIERES ET BETONS DU VAL DE SAONE15%
- ETAT MINISTERE ECOLOGIE DEVELOPPEMENT DURABLE ENERGIE<1%
- ETAT PAR DIRECTION DE L IMMOBILIER DE L ETAT<1%
- private individuals or unknown53%
- 1.55 ha LES ERABLES DE MONTPELLIER SCI · land company
- 0.74 ha SOCIETE DES CARRIERES ET BETONS DU VAL DE SAONE SAS · other
- 0.01 ha ETAT MINISTERE ECOLOGIE DEVELOPPEMENT DURABLE ENERGIE AUPM · other · management
- 0.01 ha ETAT PAR DIRECTION DE L IMMOBILIER DE L ETAT ETAT · public
Private individuals or unknown: 2.64 ha.
Share of the delimited hectares. Only legal entities are public in France; everything else stays unnamed. From the public register of legal entities (DGFiP), as of 1 January 2025. The owner is not always the one who works the vineyard: tenancy is common.
Nearby lieux-dits
- En Jargaton Regional · 300 m
- Les Branleries Regional · 300 m
- En Rachet Regional · 450 m
- En Baunit Regional · 1.0 km
- L'Eguillette Regional · 1.1 km
In the same village, measured between label points. That does not say which ones border each other; the map shows that.
Where each figure comes from
- Classification
- The INAO delimitation per denomination, cut against the cadastral parcel. Only the INAO's own plans are legally binding; this map is informational.
- Area
- Computed on the sphere from longitude and latitude (turf.area), not in Lambert-93. For an appellation this is the union of the INAO polygons across commune boundaries, measured on the unclosed geometry; the fifteen metres used to close the outline for the map are not counted. For a climat it is the union of the cadastral lieu-dit polygons with that name.
- Planted
- Parcel area times vineyard cover, where cover comes from the IGN vegetation layer supplemented by the agricultural declaration. Checked against the customs harvest declarations: median deviation 5.1 per cent over a hundred appellations.
- Elevation
- Mean of the elevation-model cells whose centre falls inside the polygon, on a 5 m grid.
- Slope
- Per-cell slope from the elevation model using Horn's method, then averaged over the cells in the polygon.
- Aspect
- Vector mean of the per-cell aspect. A plain average would turn north-east and north-west into south.
- Sun at harvest
- Hours of direct sun on 20 September under a clear sky, with the horizon in 36 directions out to six kilometres and the height of woods and buildings on top of it. Canopy height is measured where LiDAR HD covers the area and estimated from BD Forêt where it does not; the panel states which of the two was used.
- Grape variety by appellation
- Per appellation and colour the permitted varieties from the approved cahier des charges; per appellation and tier the declared hectares of white and red from the customs harvest declaration (product codes). One colour permitted: the main variety of that colour. Two colours: from 85 percent of the hectares that colour applies, in between it is called mixed. Champagne: the dominant variety from the planted hectares per variety per commune from FranceAgriMer. Per polygon the dominant variety of its parts by area. Derived, not measured: the variety per plot exists only in the customs vineyard register, which is not public. In a two-colour appellation a single plot may carry the other variety. Customs withhold small appellations (statistical secrecy), in which case the split is missing.
- Bedrock
- The geological unit covering the largest share of the polygon, from the 1:50,000 geological map. At 1:50,000 the map separates one climat from another, but not what varies inside a climat.
- Organic
- Share of the area certified organic or in conversion, from the CartoBio plot register.