Results 101 to 110 of about 43,543 (259)

Stratigraphic evidence for modern‐like glacier extents in south‐central Alaska within the last glacial period (MIS 3)

Boreas, EarlyView.
The last (Wisconsinan) glacial period was punctuated in North America by two glacial maxima, known as the Early and Late Wisconsinan glaciations. In Alaska, these maxima and their subsequent retreats have been the object of dating efforts to reconstruct local climatic events and compare them to global trends.
Bruno Belotti, Elizabeth J. Cassel, Timothy C. Bartholomaus, Michael G. Loso, Michael S. Christoffersen, John W. Holt   +5 more
wiley   +1 more source

FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL

Revista Brasileira de Geomorfologia, 2017
Bars are semi-submerged fluvial forms associated with the availability of sediments and a temporal dynamic, whose dimensions are controlled by the flow and depth of the channel.
Vanessa Cristina Dos Santos, José Cândido Stevaux, Mario Luis Assine   +2 more
doaj   +1 more source

Middle to Late Pleistocene landscape evolution and glacial dynamics in the Eastern Alps: the Gröbminger Mitterberg record, Austria

Boreas, EarlyView.
Glacial erosion during the Last Glacial Maximum (LGM) has removed much evidence of earlier glaciations and interglacials in the European Alps. At Gröbminger Mitterberg (GM), beneath a blanket of LGM till, a distinctive sediment archive preserves deposits predating the LGM.
Gerit E. U. Griesmeier, Daniel P. Le Heron, Christopher Lüthgens, Gustav Firla, Bernhard Salcher, Fabian Dremel, Jan‐Christoph Otto, Jürgen M. Reitner   +7 more
wiley   +1 more source

The Fluvial Battering Ram: Collisional Experiments Reveal the Importance of Particle Impact Energies on Bedrock Erosional Efficiency

Geophysical Research Letters
The battering of bedrock by bedload collisions is the primary mechanism by which bedrock rivers erode and landscapes evolve. The energy imparted via impacts acts to detach bedrock via the growth and intersection of surface fractures.
C. C. Masteller, H. Chandler, J. Bower
doaj   +1 more source

Debris at the edge: sedimentological dynamics of Hintereisferner's evolving terminus and glacial forefield, Austrian Alps

Boreas, EarlyView.
The interaction between glaciers and the debris accumulating on their surfaces is critical as the Earth warms, with consequences for ice dynamics, hydrology and mass balance together with slope and sedimentary processes. Understanding this interaction is necessary since it influences ablation rates, sediment and meltwater pathways.
Paulina Mejías Osorio, Ricarda Wohlschlägl, Thomas M. Vandyk, Sara Karbacher, Bethan Joan Davies, Daniel Paul Le Heron   +5 more
wiley   +1 more source

Flow hydrodynamics across open channel flows with riparian zones: implications for riverbank stability [PDF]

, 2017
Riverbank vegetation is of high importance both for preserving the form (morphology) and function (ecology) of natural river systems. Revegetation of riverbanks is commonly used as a means of stream rehabilitation and management of bank instability and ...
Liu, Da, Valyrakis, Manousos, Williams, Richard   +2 more
core   +2 more sources

Palaeolandscape reconstruction of a shallow coastal embayment in Kattegat, Denmark—influence of sea‐level changes during the latest Pleistocene and Holocene

Boreas, EarlyView.
We analyse the geological processes of a coastal embayment in the Kattegat. Using high‐resolution seismic data and sediment cores, we describe a geological evolution from glacial to shallow marine stages with a variety of preserved facies from different depositional settings, including glacio‐lacustrine, telmatic, limnic and coastal environments.
Katrine Juul Andresen, Lars Ole Boldreel, Ole Bennike, Christof Pearce, Mikkel Fruergaard, Verner Brandbyge Ernstsen, Aart Kroon, Nicole Rita Posth, Marit‐Solveig Seidenkrantz   +8 more
wiley   +1 more source

Integrated methodology for assessing the effects of geomorphological river restoration on fish habitat and riparian vegetation

, 2011
Changes in the geomorphology of rivers have serious repercussions, causing losses in the dynamics and naturalness of their forms, going in many cases, from a type of meandering channel, with constant erosion and sedimentation processes, to a channelized ...
García de Jalón Lastra, Diego, Gonzalez del Tanago del Rio, Marta, Marchamalo Sacristán, Miguel, Maroto, Judit, Martínez Marín, Rubén   +4 more
core  

Refining the timing of Middle Pleistocene (MIS 12 to MIS 6) ice advances into northern central Europe: sedimentological analysis and single‐grain luminescence dating of glaciotectonic complexes and tunnel‐valley fills

Boreas, EarlyView.
We summarize the current state of knowledge on the age of the Middle Pleistocene ice advances into northern central Europe and provide 25 new single‐grain feldspar luminescence ages of Elsterian and Saalian glacigenic sediments to constrain the age of the ice advances and their tentative correlation with marine isotope stages/substages.
Niklas von Soest, Neda Rahimzadeh, Debra Colarossi, Falko Malis, Tobias Lauer, Wera Sander‐Beuermann, Yvonne Spychala, Christian Brandes, Runa Fälber, Sumiko Tsukamoto, Jutta Winsemann   +10 more
wiley   +1 more source

Tectonic denudation and topographic development in the Spanish Sierra Nevada [PDF]

, 2007
The denudation history of the rapidly uplifting western part of the Spanish Sierra Nevada was assessed using apatite fission track (AFT) ages and 10Be analyses of bedrock and fluvial sediments.
Alfaro, Anhert, Argles, Avouac, Beck, Bierman, Bierman, Braga, Brown, Brozovic, Burbank, C. Persano, Calvache, Carrapa, Chamberlain, Codilean, Dempster, Dramis, Dunkl, Dunne, Edwards, England, Fabel, Fernández, Fifield, Gabet, Galindino-Zaldívar, Gallagher, García, Garzione, Gleadow, Gosse, Granger, Granger, Granger, Gómez, Gómez-Ortiz, Hodges, Hovius, Hovius, Hubbard, Hurford, Hurford, J. F. Shroder, Jalut, Johnson, Johnson, Kapp, Keller, Kirchner, Kohl, Kuhleman, L. J. Reinhardt, Lal, Li, Lonergan, Martínez-Martínez, McClay, Mérnard, Niemi, Platt, Platt, Reinhardt, Rey, Riebe, Rodríguez-Fernández, Roering, Sanz de Galdeano, Sanz de Galdeano, Savage, Schildgen, Schmidt, Shroder, Shroder, Simón, Small, Sorkhabi, Stone, Stroeven, Sánchez, Sánchez-Marañón, T. J. Dempster, Tucker, Tucker, Van Bemmelen, Vance, Whipple, Whipple   +87 more
core   +1 more source