Géométrie et âge des alluvions du lit majeur de la Loire moyenne, exemple du val d'Avaray (Loir-et-Cher, France)
Identifieur interne : 000F82 ( Main/Exploration ); précédent : 000F81; suivant : 000F83Géométrie et âge des alluvions du lit majeur de la Loire moyenne, exemple du val d'Avaray (Loir-et-Cher, France)
Auteurs : Manuel Garcin [France] ; Denis Giot [France] ; Geneviève Farjanel [France] ; Jean-Christophe Gourry [France] ; Wolfram Kloppmann [France] ; Philippe Negrel [France]Source :
- Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science [ 1251-8050 ] ; 1999.
Descripteurs français
- Wicri :
- geographic : France.
English descriptors
- KwdEn :
Abstract
Abstract: Incision and infilling of the flood plain of the Loire river, in the Val d'Avaray area, is polyphased during Tardiglacial and Holocene. Five main alluvial units are developed and result from successive meandering-like phases of erosion and sandy infilling. Clayey channel fillings sometimes associated with peat have been identified within the sandy units. The first investigated channel was active from Tardiglacial (11.4 ka BP, Allerød) to Boreal, the second one from 8.4 ka BP (Boreal) to 2.3 ka BP (Subatlantic) with an average sedimentation rate of 0.5 mm·yr−1. A third one was active from 3.2 ka BP (Subboreal) and during a great part of the Subatlantic; the average rate of sedimentation is evaluated at 1.3 mm·yr−1.
Url:
DOI: 10.1016/S1251-8050(00)80064-6
Affiliations:
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Five main alluvial units are developed and result from successive meandering-like phases of erosion and sandy infilling. Clayey channel fillings sometimes associated with peat have been identified within the sandy units. The first investigated channel was active from Tardiglacial (11.4 ka BP, Allerød) to Boreal, the second one from 8.4 ka BP (Boreal) to 2.3 ka BP (Subatlantic) with an average sedimentation rate of 0.5 mm·yr−1. A third one was active from 3.2 ka BP (Subboreal) and during a great part of the Subatlantic; the average rate of sedimentation is evaluated at 1.3 mm·yr−1.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Centre-Val de Loire</li><li>Région Centre</li></region><settlement><li>Orléans</li></settlement></list><tree><country name="France"><region name="Centre-Val de Loire"><name sortKey="Garcin, Manuel" sort="Garcin, Manuel" uniqKey="Garcin M" first="Manuel" last="Garcin">Manuel Garcin</name></region><name sortKey="Farjanel, Genevieve" sort="Farjanel, Genevieve" uniqKey="Farjanel G" first="Geneviève" last="Farjanel">Geneviève Farjanel</name><name sortKey="Garcin, Manuel" sort="Garcin, Manuel" uniqKey="Garcin M" first="Manuel" last="Garcin">Manuel Garcin</name><name sortKey="Giot, Denis" sort="Giot, Denis" uniqKey="Giot D" first="Denis" last="Giot">Denis Giot</name><name sortKey="Gourry, Jean Christophe" sort="Gourry, Jean Christophe" uniqKey="Gourry J" first="Jean-Christophe" last="Gourry">Jean-Christophe Gourry</name><name sortKey="Kloppmann, Wolfram" sort="Kloppmann, Wolfram" uniqKey="Kloppmann W" first="Wolfram" last="Kloppmann">Wolfram Kloppmann</name><name sortKey="Negrel, Philippe" sort="Negrel, Philippe" uniqKey="Negrel P" first="Philippe" last="Negrel">Philippe Negrel</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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