Lichenometric dating : a commentary, in the light of some recent statistical studies
Dating ; Holocene ; Lichenometry ; Methodology ; Quaternary ; Relative dating ; Statistics
This commentary paper discusses the relative merits of new mathematical approaches to lichenometry. It highlights their strong reliance on complex statistics. The A. proposes that the success of lichenometric dating over the past 50 years has
stemmed from its relative simplicity, transparency, and general field applicability. Further more, the paper raises a more general philosophical question : can statistical complexity and high precision in a geobotanical dating technique, fraught with high
The aim of this study is the definition of the geometry and structural style of the extensional fault system involved during the L’Aquila 2009 seismic sequence. The surface tectonic setting of the late Quaternary faults in the epicentral areas (i.e
. The seismic sequence reactivated 4 well-distinguished fault sources differing in geometry, size and the degree of involvement. The L’Aquila 2009 seismic sequence did not reactivate the entire surface of the involved faults. Nevertheless, on the basis of other
The March 2009 dust event in Saudi Arabia : precursor and supportive environment
Arabie saoudite ; Circulation atmosphérique ; Date2009 ; Domaine aride ; Dynamique de l'atmosphère ; Eolien ; Lithométéore ; Type de temps
À l'occasion de l'épisode des 10-11 mars 2009, l'un des plus sévères jamais enregistrés sur la péninsule arabique et spécialement sur Riyadh, revue détaillée des facteurs météorologiques (en surface aussi bien qu'en altitude), mais aussi des
Anomalie climatique ; Climat ; Date2009 ; Distribution spatiale ; Donnée climatique ; Monde ; Phénomène exceptionnel ; Type de temps
Description-explication des conditions météorologiques de 2009, à différentes échelles, en insistant sur les phénomènes exceptionnels. Malgré une faible activité solaire, l'affaiblissement de la Niña, puis le retour d'un Niño ont contribué à
Méthode climatologique de détermination de la date de transition stable de la température journalière moyenne de l'air pour une valeur seuil donnée
La méthode apparait optimale pour la séparation des tendances de changements réguliers dans des séries temporelles de dates de cette transition stable.
Arid area ; Bibliography ; Dating ; Desertification ; Forecast ; Geomorphology ; Global change ; Model ; Palaeo-environment ; Research ; Thermoluminescence ; Years 2000-2009
changes : chronologies of arid landscape development (luminescence dating); 2) assessing present changes : the relationship between modelling and field observations; 3) predicting future changes : arid landscape response to twenty-first-century
La carte cantonale française, un quart de siècle d'immobilisme (1982-2009) ?
La dernière grande vague de création de cantons date de 1982-1985. Ce redécoupage d'envergure a été un rattrapage effectué en priorité en faveur des communes de banlieue et première couronne et de certaines villes-centres. Depuis, quelques retouches
Communication de masse ; Date2009 ; Eté ; Météorologie ; Perception ; Prévision ; Prévision météorologique ; Royaume-Uni ; Type de temps
L'A. étudie l'impact de la mauvaise prévision météorologique reprise par tous les media concernant l'été 2009 au Royaume-Uni. Annoncé par le Met Office comme un été barbecue, l'été 2009 fut en fait aussi humide que les précédents. L'A. présente ici
This paper presents the study of some liquefaction features occurred near the Fossa village due to the April 6, 2009 L’Aquila earthquake (Central Italy). The investigation is based on trenching and coring campaigns as well as sedimentological
analyses and datings. The geometrical elements of the sand volcanoes on the surface, of the dike used to rise up and of the probable sandy source at depth are presented. A sandy pockets level found at less than 1 m of depth, interpreted as possible evidence
for a paleo-liquefaction event is discussed. Sedimentologic and morphoscopic analyses both provided the necessary elements and parameters to link the ca. 4 m deep sandy layers to the 2009 sand blows on the ground surface as well as to the paleo-liquefaction
Assessing the age-weathering correspondence of cosmogenic 21 Ne dated Pleistocene surfaces by the Schmidt hammer
Dating ; Erosion surface ; Galicia ; Isotope dating ; Pleistocene ; Quaternary ; Relative dating ; Spain
such as wetness and roughness in the R-values. Results show that age inferences exclusively based on R-values may not be realistic, but SH studies could be a useful tool for selecting surfaces for TCN dating.
Uranium series dates from the windy pits of the North York Moors, United Kingdom : implications or late Quaternary ice cover and timing of speleogenesis
Cave development ; England ; Glaciation ; Palaeo-environment ; Periglacial features ; Permafrost ; Quaternary ; Speleothem ; Th/U dating ; United Kingdom ; Yorkshire
The AA. present 9 thermal ionization mass spectrometry (TIMS) U-Th dates on speleothem from the windy pits (open fissures within the Corallian strata of the North York Moors), the first radiometric dates on calcite for these featues
and for this region. The dates cluster within 3 time periods : the interglacial peaks of marine isotope stage MIS 7, MIS 5 , and the Holocene, correlating with the marine isotope record and with the broad pattern of interglacial calcite deposition observed
Arid area ; Dating ; Dune ; Grain size distribution ; Heavy minerals ; Morphoscopy ; Oman ; Quaternary ; Salinity ; Sand ; Sedimentology ; Thermoluminescence ; United Arab Emirates ; Wind
regional studies which focus mainly on sand sources and OSL dating. The comparative discussion, including a re-interpretation of some dating results, leads to a better understanding of the regional end-Pleistocene wind regimes and improves the knowledge
Dating ; Deglaciation ; Geochronology ; Glacial features ; Ice sheet ; Isotope dating ; Moraine ; Quaternary ; Sweden
The AA. have used and present results of one of the first applications of the terrestrial cosmogenic nuclide (Be 10) exposure dating technique in southern Sweden with the aim of improving the understanding of the chronological history of the decay
C 14 dating ; England ; Fluvial processes ; Geochronology ; Geomorphology ; Holocene ; Lancashire ; United Kingdom ; Watershed
This paper demonstrates a robust methodology for the C 14 dating of geomorphological sequences using a case study from the lower Ribble valley, northwest England. The approach adopted incorporates using greater number of ages, targeting plant
2009
[b3] Scientific Dating Team, English Heritage, London, Royaume-Uni
Anatolia ; Fault ; Fluvial terrace ; Geomorphogenesis ; Graben ; Isotope dating ; Meander ; Pleistocene ; Quaternary ; Tectonics ; Turkey ; Valley ; Vertical movement
Geomorphological and sedimentological investigations coupled with cosmogenic datings from a Pio-Pleistocene fluvial succession and fluvial landscape atop along the southern Eskişehir Fault Zone (EFZ) allowed understanding the morphotectonic history
of Porsuk River at 900m and 850m altitudes also were mapped. The younger terrace dated by cosmogenic methods was displaced vertically about 40m by several active faults in the south of the graben. Determination of the total offset from fault scarp