C. r. par C. Paris, Urban Studies, 1976, n3, pp. 354-357. Rend accessible au public de langue anglaise les travaux des marxistes français (Castells, Lojkine...).
Aminostratigraphy ; C 14 dating ; Dating ; Flood ; Floodplain ; Geochronology ; Holocene ; Ireland ; Palaeosol ; Sedimentology ; Stratigraphy
Modern floodplain sediments in the Wicklow Mountains display a stratigraphy and sedimentology that contrasts them with earlier Holocene alluvium. This paper presents the results of a C 14 dating programme the objects of which were to date : a) more
definitively their commencement throughout the Wicklow Mountains, and b) their internal stratigraphies with a view to establishing a flood chronology. Although the results show that the immediate research aims cannot be achieved using C 14 dating they have lead
Bois ; Datation ; Datation C 14 ; Holocène ; Paléogéographie ; Suède ; Tourbe
C 14 dating ; Dating ; Holocene ; Palaeogeography ; Peat ; Sweden ; Wood
trunk in the sandur of the stream St Göljån was radiocarbon dated to 1320 C 14 years B.P. The lowermost part of a peat sequence in a soligenous mire in the valley of the stream Tangån was radiocarbon dated to 1455 C 14 years.
Archaeology ; Biogenic process ; C 14 dating ; Carbonate ; Dating ; Fruit ; Microstructure ; Quaternary
The AA. present an extended set of C 14 dates on the carbonate fraction of Lithospermum fruits from 4 modern and 11 fossil samples. The data suggest that biogenic carbonate from the fruits of Lithospermum represents suitable material for radiocarbon
L'analyse de 2 carottes prélevées dans le port antique de Sidon permet d'identifier 2 types différents de sédiments. A la base, un premier corps sableux antérieur à 3500-3000 ans avant J.-C. correspond à des fonds marins de mode battu. Après 3500
-3000 ans avant J.-C., les milieux vaseux évoquent un bassin portuaire artificiellement confiné et protégé par des structures archéologiques.
Open-system frost heave tests were performed on a silty clay using a lower boundary condition of +2°C and unidirectional freezing at -10°c from the surface, or freezing and thawing with an upper boundary temperature that cycled from -10°C to +10°C
or from -10°C to 0°C. The amont of frost heave, the distribution of moisture at the end of the experiment and the final dry density profiles all differed for the 3 cases. The experiments demonstrate that freeze-thaw history is important in assessing
Analyse spatiale ; Biographie ; Epistémologie ; Espace ; Géographie politique ; Pouvoir ; RAFFESTIN (C.) ; Territoire ; Territorialité ; Théorie sociale ; Travail
1. Penser en termes de territorialité : l'introduction de C. Raffestin à la théorie sociospatiale anglophone (F.R. Klauser). 2. Espace, territoire, et territorialité (C. Raffestin). 3. Les voyages italiens de C. Raffestin (C. Minca). 4. Entente sur
le territoire : Sack et Raffestin à propos de territorialité (A.B. Murphy). 5. Lire C. Raffestin : sentiers pour une biographie critique (J.J. Fall).
A reassessment of U-Th and C 14 ages for Late-Glacial high-frequency hydrological events at Searles Lake, California
Bilan hydrologique ; California ; Datation ; Datation C 14 ; Datation Th/U ; Etats-Unis ; Evaporite ; Niveau lacustre ; Pluvial ; Pléistocène ; Quaternaire ; Sédiment lacustre ; Tardiglaciaire ; Variation climatique
C 14 dating ; California ; Climatic variation ; Dating ; Evaporite ; Lacustrine sediment ; Lake level ; Lateglacial ; Pleistocene ; Pluvial ; Quaternary ; Th/U dating ; United States of America ; Water balance
happened during the transition interval between the last iceberg discharge event Heinrich 1, (14 500 C 14 yr B.P.) and the Bølling-Allerød warming (12 800 C 14 yr B.P.).
Improving methodology for high-resolution reconstruction of sea-level rise and neotectonics by paleoecological analysis and AMS C 14 dating of basal peats
Sea-level research in several submerging coastal regions has traditionally been based on C 14 dating of basal peats, but this approach contains 2 sources of uncertainty. Accelerator mass spectrometry (AMS) opens new perspectives for this type of sea
-level research, as illustrated by a paleoecological and AMS C 14 study of basal peats from a small study area in the Rhine-Meuse delta (Netherlands), where previous (conventional) work revealed highly problematic results. The new results further enable
Variation of the Köppen C/D climate boundary in the central United States during the 20th century
The spatial and temporal variation of the C/D Köppen climate boundary in the central United States is examined for the period 1900 to 1999. The C/D climate boundary is determined by differences in winter conditions. It represents the equatorward
edge of a persistent snow cover during winter. The most anomalous feature for the decadal maps is the distinct southerly location of the C/D boundary for the recent decade of the 1970s. This study does not provide evidence of a trend toward wintertime
warming and a northerly migration of the C/D climate boundary within the central United States.
La fiabilité des datations au C 14 pour des séquences fini-pléistocènes et les différentes phases de la glaciation wurmienne : l'exemple des Alpes Orientales et leur avant-pays
C 14 dating ; Chronostratigraphy ; Europe ; Glaciation ; Interglacial ; Palaeogeography ; Palynology ; Pleistocene ; Wurm
D'importantes divergences existant entre des datations au C 14 et un certain nombre d'analyses polliniques pour des séquences du Pléistocène supérieur des Alpes Orientales, les AA. discutent ces datations arès une mise au point terminologique de
C 14 dating ; Canada ; Deglaciation ; Geochronology ; Glacial lake ; Holocene ; Meltwater ; Pleistocene ; Quaternary ; Quebec
AMS radiocarbon cross-dating of plant debris and marine shells trapped in a lake basin on Mount St. Hilaire, Québec, provides a direct assessment of a reservoir effect totaling ca. 1800 C 14 years during the early stage of Champlain Sea. Pollen
-based extrapolation of bottommost ages on terrestrial plant macrofossils in sediments of this lake, and of another lakenearby support an estimate 11,100 C 14 yr B.P. for marine invasion in the Central St. Lawrence River Lowlands. Results indicate a 400
La région de Vuolep Allakasjaure ne s'est déglacée que peu avant 9000 av. J.-C. Vers 8600 s'amorça un réchauffement qui atteignit son maximum entre 7000 et 6000. Les périodes froides prononcées ont eu lieu vers 7500, 7300 av. J.-C, 4500 av. J.-C
., 2800-2200 av. J.-C. et pendant les siècles récents. Les datations sont faites par lichenométrie pour les moraines et C pour les sédiments lacustres et la variation en altitude de la limite des conifères. (C. Gaulin).
Cette quatrième partie contient six articles. 1. Le nouvel aménagement portuaire russe dans le golfe de Finlande (C. Cabanne, A. Varnakov et O. Efimov). 2. Le Talmondais (Vendée) : un petit pays entre terre et mer (J. Renard). 3. L'île-escale
d'Ouessant (F. Péron). 4. L'île d'Yeu revisitée (A. Miossec). 5. Les risques liés aux érosions et aux submersions côtières ; les réactions des populations riveraines : exemples sud-finistériens (J.-C. Bodéré). 6. L'image de l'Ouest à travers la revue Côté