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TitreLong extending the record on continental margins Quaternary stratigraphy
AuteurPiper, D J W
SourceTransactions of the Royal Society of South Africa vol. 61, no. 2, 2007 p. 159-165, https://doi.org/10.1080/00359190609519965
Année2007
Séries alt.Secteur des sciences de la Terre, Contribution externe 20060414
ÉditeurInforma UK Limited
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1080/00359190609519965
Mediapapier; en ligne; numérique
Formatspdf
Sujetsmarges continentales; roches sédimentaires; milieu sédimentaire; changements du niveau de la mer; niveaux paléomers; variations du niveau de la mer; milieu côtièr; glaciation; levés géophysiques; levés sismiques; levés de reflexion sismiques; changement climatique; géologie marine; géologie des dépôts meubles/géomorphologie; stratigraphie; Nature et environnement; Cénozoïque; Quaternaire
Illustrationsseismic profiles; cross-sections; plots
ProgrammeLes géosciences à l'appui de la gestion des océans
Résumé(disponible en anglais seulement)
Thick sedimentary successions on continental margins preserve a high-resolution record of environmental change on the adjacent continent. Commonly, the stratigraphic succession is well-imaged by seismicreflection profiles but lacks direct sampling by wells or boreholes. The well-dated 100 ka cyclicity of later Quaternary sea-level change can in many situations be used to infer a chronology for continental margin sediment successions that are not directly sampled. This paper presents a series of case studies that illustrate the successes and limitations of such techniques. Extreme lowstands of sea level that result in coastal or deltaic progradation, the cutting of gullies of the slope, or the incision of river valleys across the shelf are the most useful chronological markers.
GEOSCAN ID223009