Structurally controlled landscape evolution in Kula badlands, Western Turkey

Badlands are extensively eroded landscapes consisting of weakly consolidated deposits within highly dense drainage systems. Their controlling and shaping factors can differ in relation to various internal and external conditions and processes that are not always well understood. This study focuses on the development of a badland landscape affecting Miocene and Quaternary sand-clay sediments in the extensional tectonic regime of Western Turkey with a multidisciplinary approach. The area between Kula and Selendi towns exhibits a badland topography with extensively eroded surface features, deepened gullies within poorly consolidated, sand clay-sized sediments. The results of structural field mapping and morphometric analyses using a 5 m resolution DEM to study the role of structural control in the development of badlands are presented in this study. Field data analysis supported by the quantitative assessment of longitudinal gully profiles illustrates the role of pre-existing structures as faults, their orientation and geometry in net erosion-sedimentation and the development of deepened gully networks. Representative illustrations, field photographs and block diagrams are presented to show the relationship between the rock structure and badland landscape. The connection between the extensional tectonics, erosional dynamics and geomorphology point to a structurally-controlled landscape in the Kula badlands in Western Turkey

David Quentin Bowen: A memorial

The Quaternary community lost a giant and a leader on October 5, 2020, when David Quentin Bowen, known to many as “DQ” and founding editor of Quaternary Science Reviews, passed away in Cardiff. Born on February 14, 1938 in Llanelli, SouthWales, he received his PhD at University College London. David’s 50 years of contributions to our science cannot be adequately summarized in a brief memorial but past, present, and future generations of Quaternary scientists will long remember his landmark achievements in publishing, his scientific contributions, and his personal and professional class in all his endeavors

The Thames valley sediment conveyor: fluvial system development over the last two interglacial-glacial cycles [ Le " convoyeur sédimentaire " de la vallée de la Tamise]

The fluvial archive of the River Thames over the last two interglacial-glacial cycles is examined in terms of the spatial distribution of fluvial sediments across the basin and the temporal patterns of aggradation and incision. The spatial distnbution of fluvial sediments can be interpreted as a series of sedimentation zones and intervening sediment transfer zones. The factors that control the distnbution of fluvial sediments are considered. The notion of a "jerky conveyor" is utilised to develop a conceptual model of the Thames Valley Sediment Conveyor and the operation of this conveyor over the last two interglacial-glacial cycles is discussed. The model incorporates the sedimentation zones identified here and also the effects of the formation of a coastal pnsm dunng lnterglacial high-stands in sea level. The model is compared with the sedimentary record for the last interglacial-glacial cycle in the Lower Thames and its implications for understanding fluvial behaviour and the stratigraphie record are discussed.Les archives fluviatiles de la Tamise concernant les deux derniers cycles climatiques sont étudiées en termes de distribution spatiale des sédiments fluviatiles à travers le bassin et des procéssus de sédimentation et d' incision. La distnbution spatiale des sédiments fluviatiles peut être interprétée comme une succession de zones de sédimentation et de zones de transfert. Les facteurs qui contrôlent la distnbution des sédiments fluviatiles sont considérés. La notion de "convoyeur sédimentaire saccadé" est utilisée pour développer un modèle conceptuel des processus de transfert et de stockage sédimentaire dans la vallée de la Tamise. Le mode opératoire de ce modèle est discuté pour les deux derniers cycles glaciaire-interglaciaire. Le modèle incorpore les zones de sédimentation identifiées ici, ainsi que les effets de la formation d'un prisme d'accrétion côtier au cours des hauts niveaux marins interglaciaires. Le modèle est comparé avec l'enregistrement sédimentaire du dernier cycle glaciaire-interglaciaire dans la basse vallée de la Tamise, et ses implications pour la compréhension du comportement du système fluviatile et de l'enregistrement stratigraphique sont discutées.Lewis Simon, Maddy Darrel, Glenday Stuart. The Thames valley sediment conveyor: fluvial system development over the last two interglacial-glacial cycles [ Le " convoyeur sédimentaire " de la vallée de la Tamise]. In: Quaternaire, vol. 15, n°1-2, 2004. Fluvial Archives Group. Clermond-Ferrant 2002. pp. 17-28

Luminescence dating of Mid- to Late Wisconsinan aeolian sand as a constraint on the last advance of the Laurentide Ice Sheet across the Tuktoyaktuk Coastlands, western Arctic Canada

This article presents a new semantic-based transfer approach developed and applied within the Verbmobil Machine Translation project. We give an overview of the declarative transfer formalism together with its procedural realization. Our approach is discussed and compared with several other approaches from the MT literature.Comment: 6 pages (to appear in Proceedings of COLING '96

Luminescence dating of Mid- to Late Wisconsinan aeolian sand as a constraint on the last advance of the Laurentide Ice Sheet across the Tuktoyaktuk Coastlands, western Arctic Canada

No description supplie

Late Holocene climatic history of northern Germany and Denmark: peat macrofossil investigations at Dosenmoor, Schleswig-Holstein, and Svanemose, Jutland

Plant macrofossil remains have been analysed from two raised peat bogs in northern Germany and Denmark. The quantified vegetation reconstructions of each profile were subjected to multivariate analyses to extract records of changing bog surface wetness (BSW), which are interpreted in these rain-fed bogs as being proxy climate signals. Age/depth models were constructed using radiocarbon dates and a number of drier and wetter phases were defined. The records both register cooler/wetter conditions around 2700, 1800 and 1400 cal. yr BP, and at the beginning of the Little Ice Age around AD 1250–1350. These rising bog water tables must have been reflected in poorer conditions for agriculture, and in particular near Dosenmoor where the profile records a catastrophic change to such conditions culminating at 2750–2600 cal. yr BP

Holocene palaeoclimates from peat stratigraphy: macrofossil proxy-climate records from three oceanic raised peat bogs in England and Ireland

Quantified analyses of plant macrofossil remains have been made from three profiles of peat from raised bogs spanning a distance of 425 km from western Ireland to northern England. The reconstructed vegetation of each profile is related to changing bog surface wetness (BSW), and since the bogs are ombrotrophic these BSW changes are interpreted in terms of changing climate. Using age/depth models based on a total of 49 radiocarbon dates a number of wetter and drier phases are identified, and phase-shifts to wetter and/or cooler climates are defined. Prominent coincident changes to wetter conditions are dated in at least two of the profiles to ca 4400–4000, 1750, 1400, and 1000 cal. BP and in all three profiles at 3200, 2750–2350, 2250, and around 700 cal. BP. These phases are related to proxy climate changes in other terrestrial data sets from northwest Europe and a broad degree of synchroneity is demonstrated

Fluvial Archives Group (FLAG) Meeting, Clermont-Ferrand, September 2002. Préface

Pastre Jean François, Antoine Pierre, Bridgland David, Maddy Darrel. Fluvial Archives Group (FLAG) Meeting, Clermont-Ferrand, September 2002. Préface. In: Quaternaire, vol. 15, n°1-2, 2004. Fluvial Archives Group. Clermond-Ferrant 2002. pp. 3-4

Late Holocene climatic history of northern Germany and Denmark: peat macrofossil investigations at Dosenmoor, Schleswig-Holstein, and Svanemose, Jutland

Plant macrofossil remains have been analysed from two raised peat bogs in northern Germany and Denmark. The quantified vegetation reconstructions of each profile were subjected to multivariate analyses to extract records of changing bog surface wetness (BSW), which are interpreted in these rain-fed bogs as being proxy climate signals. Age/depth models were constructed using radiocarbon dates and a number of drier and wetter phases were defined. The records both register cooler/wetter conditions around 2700, 1800 and 1400 cal. yr BP, and at the beginning of the Little Ice Age around AD 1250–1350. These rising bog water tables must have been reflected in poorer conditions for agriculture, and in particular near Dosenmoor where the profile records a catastrophic change to such conditions culminating at 2750–2600 cal. yr BP