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:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000744
- to stream Istex, to step Curation: 000744
- to stream Istex, to step Checkpoint: 000B58
- to stream Main, to step Merge: 001004
- to stream Main, to step Curation: 000F82
Le document en format XML
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<front><div type="abstract" xml:lang="en">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.</div>
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<name sortKey="Gourry, Jean Christophe" sort="Gourry, Jean Christophe" uniqKey="Gourry J" first="Jean-Christophe" last="Gourry">Jean-Christophe Gourry</name>
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