Search Results - (Author, Cooperation:J. Syvitski)
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1Latest Papers from Table of Contents or Articles in PressC. N. Waters ; J. Zalasiewicz ; C. Summerhayes ; A. D. Barnosky ; C. Poirier ; A. Galuszka ; A. Cearreta ; M. Edgeworth ; E. C. Ellis ; M. Ellis ; C. Jeandel ; R. Leinfelder ; J. R. McNeill ; D. Richter ; W. Steffen ; J. Syvitski ; D. Vidas ; M. Wagreich ; M. Williams ; A. Zhisheng ; J. Grinevald ; E. Odada ; N. Oreskes ; A. P. Wolfe
American Association for the Advancement of Science (AAAS)
Published 2016Staff ViewPublication Date: 2016-01-09Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Aluminum/analysis ; *Biota ; Carbon Cycle ; Climate ; Construction Materials/analysis ; *Earth (Planet) ; Fossil Fuels/adverse effects ; Geologic Sediments/*chemistry ; *Human Activities ; Humans ; Ice/analysis ; Introduced Species ; Plastics/analysis ; Radioactive Fallout/analysis ; Radioisotopes/analysisPublished by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2014-12-05Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Climate Change ; *Conservation of Natural Resources ; Engineering ; Environmental Policy ; Floods ; Oceans and Seas ; *RiversPublished by: -
3Articles: DFG German National LicensesStaff View
ISSN: 1365-3091Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeosciencesNotes: The 1979 Nice turbidity current is modelled using a visco-plastic analysis of flow velocity because the initial flow concentrations are expected to have been very high. The complete history of the failed sediment from debris flow to turbidity current plume is therefore addressed. The turbidity current portion is considered as a steady state flow divided into a dense bottom flow and an upper plume. Model results show that a dense flow can be generated from the debris flow by the disaggregation of the initial slide. The dense flow would be strongly erosive and able to create and maintain a low-density plume at its surface. The depth of erosion of the channel floor by the dense flow is predicted to reach 6–11 m in overconsolidated sediments, with the main erosion taking place in Var Canyon and the Upper Fan Valley. The eroded volume (108 m3) provides additional material to the sediment mass of the initial failure. The dense flow appears able to inject fine sand and silt into the overlying plume during 90 km, and would disintegrate before being able to deposit sediment. The extensive sand layer along the travel path of the turbidity current may have been deposited from the tail of the trailing plume: a result of the velocity difference between the plume and the dense flow. Observations on sedimentary structures, erosion features and distribution of the sand deposit are quite in agreement with our modelling approach. For example, gravel waves can be generated when loose deposits are reworked by the supercritical dense flow. The methodology and equations presented here provide a good estimate of the geological consequences of a high-velocity gravity flow undergoing rheological transition.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 1432-1157Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesNotes: Abstract Pisces submersible dives within Baffin Island fjords have revealed the common occurrence of pits on the sea floor, at water depths between 40 and 326 m. The size of these pits are in the decimeter to meter range. Through indirect evidence (by comparison of morphologic features to pits or gouges of known origin) they are believed to be feeding traces of narwhal, beluga, or bowhead whales. If so, they are the deepest mammalian feeding traces yet reported. Bioerosion by large foraging mammals may be a more common sea floor process than previously thought.Type of Medium: Electronic ResourceURL: