The Late Palaeozoic glaciation subsurface record, Chaco Basin (Bolivia)

Late Palaeozoic glaciation is the longest of the Phanerozoic era. It is recorded in numerous Gondwanian basins, some having a high petroleum potential like the Chaco Basin. In this basin, the quality of the available seismic, well and outcrop data permits to characterise the Late Palaeozoic glacial record. Palaeovalleys >500 m deep and ~7 km wide have here been analysed. Focusing on the glaciogenic Carboniferous deposits, the seismic data with well-ties and their outcrop analogues provide new sedimentological insights. The palaeovalley infill is imaged as a chaotic seismic facies overlain by an aggrading-prograding prism, interpreted as tillites covered by a fluvio-deltaic system respectively. Tillites form both under the ice and during rapid ice recession whereas fluvio-deltaic systems can only originate from a stable ice margin and last until the ice sheets withdraw inland. These two depositional modes are repeated several times generating the progressive burial of the Carboniferous palaeovalleys. This succession of erosions and fills records major glacial stages containing a series of glacial and interglacial phases from the Late Devonian to the Early Permian. Depicting the Late Palaeozoic glacial history of the Chaco Basin seems crucial for the localisation of potential good reservoirs

Frequency of low back pain among men and women aged 30 to 64 years in France. Results of two national surveys.

International audienceINTRODUCTION: In France, most studies of low back pain (LBP) have been carried out among workers or patients. Until very recently, the frequency of LBP in the general population was not known, because National Health Surveys did not include questions on LBP. OBJECTIVE: To estimate the prevalence of LBP in the French population aged 30 to 64 years. MATERIALS AND METHODS: The main data were from the National Health Survey 2002-2003 (n=14,248). LBP was assessed by an accompanying self-administered questionnaire asking details about duration of LBP in the previous 12 months. Weights were used to estimate the prevalence of LBP in the French population, with two definitions of LBP. Additional results dealing with chronic LBP, from another national survey (Handicap, Disability and Dependence), are also briefly presented. RESULTS: More than half of the French population in this age group experienced LBP at least one day in the previous 12 months (LBP1), with 17% experiencing LBP for more than 30 days in the previous 12 months (LBP30); prevalence differed between men and women and that of LBP30 increased with age. DISCUSSION-CONCLUSION: The prevalence of LBP as assessed by the National Health Survey is similar to that found in countries other than France. These estimates can be used as a reference for surveys in specific populations, provided that comparable methodologies are used

Low back pain around retirement age and physical occupational exposure during working life

<p>Abstract</p> <p>Background</p> <p>Physical occupational exposure is a risk factor for low back pain in workers but the long term effects of exposure remain unclear. As several countries consider increasing the retirement age, further information on this topic is relevant. This study aimed to describe the prevalence of low back pain among middle aged and aging individuals in the general French population according to physical occupational exposure and retirement status.</p> <p>Methods</p> <p>The study population originated from the French national survey 'Enquête décennale santé 2002'. Low back pain for more than 30 days within the previous twelve months (LBP) was assessed using a French version of the Nordic questionnaire. Occupational exposure was self assessed. Subjects were classified as "exposed" if they were currently or had previously been exposed to handling of heavy loads and/or to tiring postures. The weighted prevalence of LBP was computed separately for men and women, for active (aged 45-59) and retiree (aged 55-74), according to 5-year age group and past/present occupational exposure.</p> <p>Results</p> <p>For active men, the prevalence of LBP was significantly higher in those currently or previously exposed (n = 1051) compared with those never exposed (n = 1183), respectively over 20% versus less than 11%. Among retired men, the prevalence of LBP tended towards equivalence with increasing age among those previously exposed (n = 748) and those unexposed (n = 599).</p> <p>Patterns were quite similar for women with a higher prevalence in exposed active women (n = 741) compared to unexposed (n = 1260): around 25% versus 15%. Similarly, differences between previously exposed (n = 430) and unexposed (n = 489) retired women tended to reduce with age.</p> <p>Conclusion</p> <p>The prevalence of LBP in active workers was associated with occupational exposure. The link with past exposure among retirees decreased with age. These results should be considered for policies dealing with prevention at the workplace and retirement.</p

Détermination de Vulpes corsac (L., 1768) au sein d’assemblages fossiles du Pléistocène supérieur : données ostéométriques et clef morphologique dentaire

Lanoë François. Détermination de Vulpes corsac (L., 1768) au sein d’assemblages fossiles du Pléistocène supérieur : données ostéométriques et clef morphologique dentaire. In: Bulletin de la Société préhistorique française, tome 109, n°2, 2012. pp. 331-334

Nouveaux vestiges des sanctuaires du Moyen Empire à Karnak. Les fouilles récentes des cours du VIe pylône

International audienc

Rezé (Loire-Atlantique), Saint-Lupien, Parvis du CIAP, le Chronographe : rapport de fouilles

Cette opération archéologique préventive de petite superficie est implantée en plein coeur d’un site archéologique fouillé de longue date : le quartier portuaire de Saint-Lupien, situé dans l’agglomération secondaire antique de Ratiatum.Les vestiges découverts s’inscrivent dans les étapes successives de la métamorphose urbaine du quartier, lequel s’est développé du début du Ier s. de n. è. au Bas-Empire.Malgré l’arasement des surfaces, la stratigraphie préservée et la présence de structures en creux nous permettent de dégager une chronologie en cinq phases.L’identification d’indices d’activités liées à la métallurgie du fer dans le courant du Ier siècle constitue un complément d’information intéressant à l’échelle du site, qui viendra compléter le dossier de l’activité artisanale du quartier, en cours de synthèse.Enfin, les informations relatives à l’urbanisme ne sont pas en reste, dans la mesure où l’on voit se dégager de manière assez inédite le plan cohérent de bâtiments appartenant à la période antérieure à la mise en place des grands entrepôts commerciaux portuaires. Paradoxalement, l’époque de ces édifices emblématiques n’est représentée qu’à l’état de substructions, les sols associés ayant ici encore disparu

Karnak. Au coeur du temple d'Amon-Rê

International audienc

Rezé (Loire-Atlantique), Saint-Lupien, Parvis du CIAP, le Chronographe : rapport de fouilles

Cette opération archéologique préventive de petite superficie est implantée en plein coeur d’un site archéologique fouillé de longue date : le quartier portuaire de Saint-Lupien, situé dans l’agglomération secondaire antique de Ratiatum.Les vestiges découverts s’inscrivent dans les étapes successives de la métamorphose urbaine du quartier, lequel s’est développé du début du Ier s. de n. è. au Bas-Empire.Malgré l’arasement des surfaces, la stratigraphie préservée et la présence de structures en creux nous permettent de dégager une chronologie en cinq phases.L’identification d’indices d’activités liées à la métallurgie du fer dans le courant du Ier siècle constitue un complément d’information intéressant à l’échelle du site, qui viendra compléter le dossier de l’activité artisanale du quartier, en cours de synthèse.Enfin, les informations relatives à l’urbanisme ne sont pas en reste, dans la mesure où l’on voit se dégager de manière assez inédite le plan cohérent de bâtiments appartenant à la période antérieure à la mise en place des grands entrepôts commerciaux portuaires. Paradoxalement, l’époque de ces édifices emblématiques n’est représentée qu’à l’état de substructions, les sols associés ayant ici encore disparu

Karnak. Au coeur du temple d'Amon-Rê

International audienc

Nouveaux vestiges des sanctuaires du Moyen Empire à Karnak. Les fouilles récentes des cours du VIe pylône

International audienc