Cadre paleoenvironnemental et paléoclimatique des occupations du Paléolithique supérieur et du Mésolithique : approche malacologique et géochimique combinée de la séquence de tuf de l'Ilôt Renaudin à Angoulême

International audienceThe redevelopment of the train station district at Angoulême motivated rescue archaeological works led by the Inrap. They revealed a Late Glacial to Holocene sequence including Azilian, Laborian and Mesolithic remains. In the western part of the site, silty deposits intercalated with organic layers dated from the Early Holocene (9940 + 40 à 6910 + 30 BP) and overlaid by 3 m of calcareous tufa. Tufas routinely host evidence of past environmental conditions via well-preserved faunal and floral assemblages (as mollusc shells, leaf prints, mammal remains, etc.) and preserve potential archaeological levels in situ. Additionally, as they mostly comprise of calcite precipitated at ambient temperature, tufas are also suitable targets for palaeoclimatic reconstructions, especially from oxygen and carbon isotopes, which allow combining palaeoenvironmental to truly synergic but independent climatic reconstructions. Tufas are thus key deposit in continental area to investigate environmental and climatic dynamic and associated human occupations. The multidisciplinary approach of calcareous tufas, combining especially malacology and geochemistry has already provided significant results at other Holocene sites in Europe but the discovery of the Angoulême-Renaudin sequence provide the first opportunity to develop such investigation in Southwestern France. The whole stratigraphical succession was continuously sampled providing 40 malacological samples strictly parallel to 40 geochemical samples. Together with stratigraphic and sedimentological data, palaeoenvironmental and palaeoclimatic data provide a detailed framework to the succession of the different human occupation at the site.Dans le cadre des opérations d’archéologie préventive menées par l’Inrap sur le chantier de réaménagement du quartier de la Gare d’Angoulême, une séquence Tardiglaciaire-Holocène contenant des vestiges aziliens, laboriens et mésolithiques a été mise au jour. Dans la partie ouest du site, le colmatage d’une ancienne dépression présente une succession de dépôts limoneux à passées organiques datés du début Holocène (9940 + 40 à 6910 + 30 BP) surmontés par un tuf calcaire conservé sur 3 m d’épaisseur. Le mode de dépôt des tufs permet la conservation in situ d’éventuels niveaux archéologiques ainsi que la préservation d’informations paléontologiques et paléoenvironnementales variées et de grande qualité (mollusques, empreintes foliaires, restes de mammifères, etc.). De plus, leur composition en calcite (près de 95%) permet d’utiliser des indicateurs climatiques géochimiques indépendant des vestiges paléontologiques, en particulier les isotopes stables de l’oxygène et du carbone (δ18O et δ13C). Les tufs sont donc un contexte exceptionnel en domaine continental pour l’étude des dynamiques environnementales et climatiques et des occupations humaines associées. Si l’approche pluridisciplinaire des tufs calcaires, couplant géochimie et malacologie, a déjà fait ses preuves sur d’autres séquences européennes de tuf holocène, la découverte d’une séquence de tuf à Angoulême a permis de réaliser une étude de ce type pour la première fois dans le quart sud-ouest de la France. L’ensemble de la stratigraphie et plus particulièrement la séquence de tuf ont fait l’objet d’un échantillonnage en continu détaillé avec en parallèle, 40 échantillons malacologiques et autant d’échantillons géochimiques. Couplés aux données stratigraphiques et sédimentologiques, les reconstitutions paléoclimatiques et paléoenvironnementales obtenues permettent de fournir un cadre précis à la succession des différentes occupations humaines sur le site

Cadre paleoenvironnemental et paléoclimatiques des occupations du Paléolithique supérieur et du Mésolithique : approche malacologique et géochimique combinée de la séquence de tuf de l’Ilôt Renaudin à Angoulême

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First fluvial archive of the 8.2 and 7.6–7.3 ka events in North Africa (Charef River, High Plateaus, NE Morocco)

International audienceThe Early–Mid Holocene transition is a period of profound changes in climatic mechanisms and hydrological features in Europe and North Africa. The melting of the Laurentide ice sheet led to an oceanic and atmospheric reorganisation in the North Atlantic, while the Mediterranean underwent a major hydrological shift. The impacts on Mediterranean rivers remain unclear, as there are few records documenting responses to the 8.2 ka event (the main Holocene climatic degradation). We present a fluvial record from Eastern Morocco documenting detailed hydrological variations from 8200 to 7500 cal. BP and their climatic forcing. A major hydrogeomorphic evolution of the Charef River occurred at that time, marked by two major incision stages close in time, under hyper-arid conditions at 8200 and ca. 7500 cal. BP. The impacts of these phenomena on the alluvial plains and associated archaeological records during Neolithisation, a major process in human history, currently remain unidentified. This new record sheds light on the fluvial response to the 8.2 ka event in North Africa and why other records are missing. We also bring new insights into the hydrological disruption at the Early–Mid Holocene transition, which was driven by the end of deglaciation combined with insolation and solar forcing. Furthermore, centennial solar variability may have paced river activity in the Moulouya basin and arid regions of North Afric

First fluvial archive of the 8.2 and 7.6–7.3 ka events in North Africa (Charef River, High Plateaus, NE Morocco)

International audienceThe Early–Mid Holocene transition is a period of profound changes in climatic mechanisms and hydrological features in Europe and North Africa. The melting of the Laurentide ice sheet led to an oceanic and atmospheric reorganisation in the North Atlantic, while the Mediterranean underwent a major hydrological shift. The impacts on Mediterranean rivers remain unclear, as there are few records documenting responses to the 8.2 ka event (the main Holocene climatic degradation). We present a fluvial record from Eastern Morocco documenting detailed hydrological variations from 8200 to 7500 cal. BP and their climatic forcing. A major hydrogeomorphic evolution of the Charef River occurred at that time, marked by two major incision stages close in time, under hyper-arid conditions at 8200 and ca. 7500 cal. BP. The impacts of these phenomena on the alluvial plains and associated archaeological records during Neolithisation, a major process in human history, currently remain unidentified. This new record sheds light on the fluvial response to the 8.2 ka event in North Africa and why other records are missing. We also bring new insights into the hydrological disruption at the Early–Mid Holocene transition, which was driven by the end of deglaciation combined with insolation and solar forcing. Furthermore, centennial solar variability may have paced river activity in the Moulouya basin and arid regions of North Afric

Proceedings of the Survivorship Care in Neuro-Oncology Workshop sponsored by the Comprehensive Oncology Network Evaluating Rare CNS Tumors (NCI-CONNECT).

BackgroundSurvivorship for those living with primary CNS cancers begins at diagnosis, continues throughout a person's life, and includes caregivers. Opportunities and challenges exist to advance survivorship care for those living with primary CNS cancers that necessitate stakeholder involvement.MethodsIn June 2021, NCI-CONNECT convened a two-day virtual workshop about survivorship care in neuro-oncology. Two expert panels provided key recommendations and five working groups considered critical questions to identify strengths, weaknesses, opportunities, and threats to the advancement of survivorship care and developed recommendations and action items.ResultsThe following action items emanated from the workshop: seek endorsement of meeting report from stakeholder organizations; address barriers in access to survivorship care and provider reimbursement; advance survivorship research through NIH and private grant support; develop a survivorship tool kit for providers, people living with primary CNS cancers and their caregivers; provide accessible educational content for neuro-oncology, neurology, and oncology community providers about survivorship care in neuro-oncology; and establish core competencies for survivorship care for neuro-oncology providers to be included in training and standardized exams.ConclusionsAction items aim to address access and reimbursement barriers, expand patient and provider education, develop core competencies, and support survivorship research through funding and other supports