Terroir 2006 banner
IVES 9 IVES Conference Series 9 Results of late-wurmian to present-day climatic-geological evolution on to spatial variability of pedologic-geological characters of the AOC Gaillac terroirs (Tarn, Midi-Pyrénées)

Results of late-wurmian to present-day climatic-geological evolution on to spatial variability of pedologic-geological characters of the AOC Gaillac terroirs (Tarn, Midi-Pyrénées)

Abstract

The AOC Gaillac area is divided into three main terroirs : « The left bank terraces », « The right bank coteaux » and « The plateau Cordais ». This division is valid at a regional scale, but it suffers of a number of local-scale exceptions. This spatial variability of the pedologic-geologic characteristics at the plot scale has been derived mainly from the main late-Würmian solifluxion phase occurring at the transition between the peri-glacial climate and the Holocene temperate conditions (13,000-10,000 yrs BP). This soil movement processing has generated tongue-shaped features composed of a mixed molassic-fluviatil material mostly on north-oriented slopes, concealing the in-situ molassic bedrock. This spatial variability has to be taken into account in any viticultural zoning strategy using extraction of morphometric data from a Digital Elevation Model (DEM) as slope gradient and slope orientation maps.

DOI:

Publication date: December 22, 2021

Issue: Terroir 2006

Type: Article

Authors

Pierre COURJAULT-RADE (1), Marguerite MUNOZ (1), Eric MAIRE1 et Nicolas HIRISSOU (2)

(1) Laboratoire des Mécanismes de Transferts en Géologie (LMTG), UMR 5563 CNRS, 14, avenue E. Belin, 31400 Toulouse, France
(2) Domaine du Moulin, chemin de Bastié, 81600 Gaillac, France

Contact the author

Keywords

Gaillac, geology, scale analysis, terroirs, viticultural zoning

Tags

IVES Conference Series | Terroir 2006

Citation

Related articles…

Sustainable management of grapevine trunk diseases

Grapevine trunk diseases (GTD) occur wherever grapes are grown and are considered the main biotic factor reducing yields and shortening vineyards’ lifespan. Currently, no product is available to eradicate GTD once grapevines are infected. Therefore, prophylactic strategies based on pruning wound protection and ‘remedial surgery’, the only eradication method based on the elimination of infected wood and renewal of the vine by means of new canes or suckers, are the only effective strategies available. The Canadian grape and wine industry focusses on a sustainable production and thus, looking for alternatives to chemicals for disease management is a top priority.

Influence of the agronomic management on the aroma of Riesling wines

Nitrogen fertilisation of grapevines is known to influence not only plant development and production yield, but also yeast assimilable nitrogen (YAN). This parameter is related to the growth of yeast

EVALUATION OF A SEAWEED EXTRACT OF RUGULOPTERYX OKAMURAE AGAINST ERYSIPHE NECATOR IN GRAPEVINE

Powdery mildew, caused by Erysiphe necator, is a widespread disease that causes high economical losses in viticulture. The main strategy to control the disease is the recurrent application of sulphur based phytochemical compounds. However, in order to reduce their accumulation in the environment and promote the sustainability of the sector, the European Commission has applied restrictions to the number of pesticide treatments and the maximum quantity of fungicides to be applied in viticulture. Seaweeds, in particular macroalgae, are marine resources rich in sulphated polysaccharides with bio-protective potential for the plant, representing an environmentally-friendly alternative approach for sustainable wine production.

New plant protein extracts as fining agents for red wines

AIM: Quinoa (Chenopodium quinoa) is a non-allergenic pseudocereal with a high protein content

Oxygen consumption and changes in chemical composition of young wines

The study of the capacity to consume oxygen of the wines is an aspect of great interest since it allows to analyse their useful life.