Daniel C. Douglass, Brad S. Singer, M. R. Kaplan, D MICKELSON, M. W. Caffee,
... boulders on six last-glacial and late-glacial moraines at Lago Buenos Aires, Argentina (LBA; 71°W, 46.5°S). Seven of the 49 boulders are identified as anomalously young, and are interpreted to have been exhumed after moraine deposition. The remaining 42 samples indicate that glacial ...
Tópico(s): Geological formations and processes
2006 - Elsevier BV | Quaternary Geochronology
Daniel C. Douglass, James G. Bockheim,
... glacial deposits in Argentina to the well-dated moraines at Lago Buenos Aires.
Tópico(s): Coastal wetland ecosystem dynamics
2005 - Cambridge University Press | Quaternary Research
Jorge A. Strelin, George H. Denton, Marcus J. Vandergoes, Ulysses S. Ninnemann, Aaron E. Putnam,
... receded to just outboard of the outer Holocene moraines at Lago Frías and Lago Pearson (Anita) prior to 10, ... also matches recently published chronologies of late-glacial moraines in the Southern Alps of New Zealand on the opposite side of the Pacific Ocean from Lago Argentino. Finally, the timing of the late-glacial ...
Tópico(s): Geological formations and processes
2011 - Elsevier BV | Quaternary Science Reviews
... San Lorenzo (MSL). Soler Glacier (NPI) produced lateral moraines above Lago Bertrand from 15.1 ± 0.7 to 14. ... Cochrane at 13.0 ± 0.6 ka. These moraines were deposited in an ice-dammed palaeolake unified through the Baker Valley (Lago Chalenko; 350 m asl). The Salto Valley glaciolacustrine landsystem includes subaqueous morainal banks, ice-scoured bedrock, glacial diamicton plastered onto valley sides, perched delta terraces, kame terraces, ice-contact fans, palaeoshorelines and subaerial push and lateral moraines. Boulders from the subaqueous Salto Moraine became exposed ...
Tópico(s): Pleistocene-Era Hominins and Archaeology
2003 - Elsevier BV | Quaternary Science Reviews
Bethan J. Davies, Varyl R. Thorndycraft, Derek Fabel, Julian R.V. Martin,
... San Lorenzo (MSL). Soler Glacier (NPI) produced lateral moraines above Lago Bertrand from 15.1 ± 0.7 to 14. ... Cochrane at 13.0 ± 0.6 ka. These moraines were deposited in an ice-dammed palaeolake unified through the Baker Valley (Lago Chalenko; 350 m asl). The Salto Valley glaciolacustrine landsystem includes subaqueous morainal banks, ice-scoured bedrock, glacial diamicton plastered onto valley sides, perched delta terraces, kame terraces, ice-contact fans, palaeoshorelines and subaerial push and lateral moraines. Boulders from the subaqueous Salto Moraine became exposed ...
Tópico(s): Pleistocene-Era Hominins and Archaeology
2018 - Elsevier BV | Quaternary Science Reviews
Neil F. Glasser, Krister N. Jansson, Bradley W. Goodfellow, Hernán De Angelis, Helena Rodnight, Dylan H. Rood,
... moraines and lake shorelines. There are five prominent moraine belts in the Lago San Martin Valley, associated with extensive sandar (glaciofluvial ... or in kettleholes within end moraine ridges. The moraine boulder ages also point to possible pre-LGM glacial advances during the last glacial cycle and a key observation from our data is that the LGM glaciers were probably less extensive in the Lago San Martin Valley than previously thought.
Tópico(s): Cryospheric studies and observations
2010 - Cambridge University Press | Quaternary Research
... It presents a model for formation of the moraines around Lagos Puyehue and Rupanco where there is a nested complex dating from the last glaciation. These moraines can be divided into two types on the ...
Tópico(s): Cryospheric studies and observations
1996 - Wiley | Earth Surface Processes and Landforms
Alun Hubbard, Andrew S. Hein, Michael R. Kaplan, Nick Hulton, Neil F. Glasser,
... to bracket the Fenix I‐V suite of moraines at Lago Buenos Aires. However, 900 m of ELA lowering yields an ice sheet which best matches the Fenix V moraine (c. 23000 a BP) and Caldenius’ reconstructed LGM ...
Tópico(s): Climate change and permafrost
2005 - Taylor & Francis | Geografiska Annaler Series A Physical Geography
Michael R. Kaplan, Daniel C. Douglass, Brad S. Singer, Robert P. Ackert, Marc W. Caffee,
At Lago Buenos Aires, Argentina, 10 Be, 26 Al, and 40 Ar/ 39 Ar ages range from 190,000 to 109,000 yr for two moraines deposited prior to the last glaciation, 23,000�16,000 yr ago. Two approaches, maximum boulder ages ...
Tópico(s): Geological formations and processes
2005 - Cambridge University Press | Quaternary Research
Antoine Cogez, Frédéric Herman, Éric Pelt, Thierry Reuschlé, Gilles Morvan, Christopher M. Darvill, Kevin Norton, Marcus Christl, Lena Märki, François Chabaux,
... thorium disequilibrium data for a series of nested moraines around Lago Buenos Aires in Argentine Patagonia. The glacial chronology for the area is constrained using in situ cosmogenic 10Be analysis of glacial outwash. Sediment transfer times within the periglacial domain were estimated by comparing the deposition ages of moraines to the theoretical age of sediment production, i. ...
Tópico(s): Geological and Geochemical Analysis
2018 - Copernicus Publications | Earth Surface Dynamics
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
Tópico(s): Aeolian processes and effects
2006 - Cambridge University Press | Quaternary Research
Nils‐Axel Mörner, Claudio A. Sylwan,
In the Lago Buenos Aires area, fifteen separate terminal moraines were identified that are grouped into five major zones representing “ice ages” or glaciation complexes. Paleomagnetism of proglacial ... a normal (Brunhes) polarity and the outermost five moraines (and two zones) have a reversed (Matuyama) polarity. This suggests that the original chronology of Caldenius from 1932 — and hence correlations with the Northern Hemisphere — must be completely revised. En la región del Lago Buenos Aires se identificaron quince morenas frontales diferentes, ...
Tópico(s): Pleistocene-Era Hominins and Archaeology
1989 - Elsevier BV | Journal of South American Earth Sciences
Michael R. Kaplan, Robert P. Ackert, Brad S. Singer, Daniel C. Douglass, Mark D. Kurz,
... and 14C ages, for seven of the youngest moraines east of Lago Buenos Aires, Argentina, 46.5°S, that were ... formed during marine oxygen isotope stage 2; no moraines dating to stage 4 were found. For stage 2, the distribution of ages at Lago Buenos Aires is similar to cosmogenic nuclide-based ...
Tópico(s): Methane Hydrates and Related Phenomena
2004 - Geological Society of America | Geological Society of America Bulletin
M. R. Kaplan, Joerg M. Schaefer, Jorge A. Strelin, George H. Denton, Robert F. Anderson, Marcus J. Vandergoes, Robert C. Finkel, Roseanne Schwartz, Scott G. Travis, Juan‐Luis García, Mateo A. Martini, Simon H.H. Nielsen,
We present a comprehensive 10Be chronology for Holocene moraines in the Lago Argentino basin, on the east side of the ... different areas, where prior studies show ample glacier moraine records exist because they were formed by outlet glaciers sensitive to climate change. The 10Be dated records are from the Lago Pearson, Herminita Península-Brazo Upsala, and Lago Frías areas, which span a distance of almost 100 km adjacent to the modern Icefield. New 10Be ages show that expanded glaciers and moraine building events occurred at least at 6120 ± 390 ( ...
Tópico(s): Geological formations and processes
2016 - Elsevier BV | Quaternary Science Reviews
Andrew S. Hein, Nicholas R. J. Hulton, Tibor J. Dunai, David E. Sugden, Michael R. Kaplan, Sheng Xu,
... ka and was interrupted as evidenced by the Lago Columna moraines up-valley. Subsequently the outlet glaciers occupying both the Lago Pueyrredón basin (Chilean name: Lago Cochrane) and the ...
Tópico(s): Geological formations and processes
2010 - Elsevier BV | Quaternary Science Reviews
Rodrigo L. Soteres, Esteban A. Sagredo, Michael R. Kaplan, Mateo A. Martini, Patricio I. Moreno, Scott A. Reynhout, Roseanne Schwartz, Joerg M. Schaefer,
... 10 Be surface exposure ages from well-preserved moraines in the Lago Palena/General Vintter basin in northern Patagonia (~ 44° ...
Tópico(s): Climate change and permafrost
2022 - Nature Portfolio | Scientific Reports
Christian Schluchter, Pierre Gander, Thomas V. Lowell, George H. Denton,
... arcuate arrangement just west of the terminal Llanquihue moraines deposited by the Lago Llanquihue piedmont ice lobe at the last glacial maximum. These clusters are physically connected along the eastern side to the Llanquihue terminal moraines, and along the western side to the Llanquihue ...
Tópico(s): Cryospheric studies and observations
1999 - Taylor & Francis | Geografiska Annaler Series A Physical Geography
Tomáš Pánek, Elisabeth Schönfeldt, Diego Winocur, Michal Břežný, Karel Šilhán, V. Chalupa, Oliver Korup,
... kinematics and approximate timing of giant landslides in moraines and other glacial deposits in the Lago Pueyrredón valley (LPV), Argentina. For the first time, ...
Tópico(s): Geology and Paleoclimatology Research
2020 - Elsevier BV | Quaternary Science Reviews
Jorge A. Strelin, Eduardo C. Malagnino,
... speculated about the age of the Puerto Bandera moraines. Detailed geomorphologic studies in the western area of Lago Argentino, including stratigraphic profiles at Bahı́a del Quemado in the northern branch (Brazo Norte), indicate that the Puerto Bandera moraines were deposited by three pulses of ice. Each ... 000 14 C yr B.P. The youngest moraine system was deposited during a minor readvance, shortly before 10,390 C 14 yr B.P., and thus appears to have occurred some time during the European Younger Dryas interval. After this third substade, the ice tongues retreated into the interior branches of Lago Argentino and have remained there since. Evidence found ...
Tópico(s): Coastal wetland ecosystem dynamics
2000 - Cambridge University Press | Quaternary Research
Brad S. Singer, Robert P. Ackert, Hervé Guillou,
... marine oxygen isotope stage 6. Further westward toward Lago Buenos Aires, six additional moraines younger than the Cerro Volcán basalt flow occur. ... an important Patagonian glaciation at 60–40 ka, moraines corresponding to marine oxygen isotope stage 4 are not preserved at Lago Buenos Aires; apparently, these were overrun and obliterated ...
Tópico(s): Evolution and Paleontology Studies
2004 - Geological Society of America | Geological Society of America Bulletin
... than the Pleistocene glaciations. Due to glacial meltwater, Lago Cardiel was significantly larger and served as a regional catchment area during these early glaciations in southern South America. The erratic boulders of the southeastern lake terraces at more than 350 m above modern lake level may be attributed to the oldest late Miocene moraine or outwash plain.
Tópico(s): Geological formations and processes
2006 - Institute of Arctic and Alpine Research | Arctic Antarctic and Alpine Research
Juan‐Luis García, Jorge A. Strelin, Rodrigo Vega, Brenda L. Hall, Charles R. Stern,
... link to phases of glacier advance (e.g., moraine building) and retreat. During the late-glacial, the Lago del Toro ice lobe pushed and glaciotectonized ice-contact lake sediments several times to shape the TDP moraine ridges fringing present-day lake. The saw-toothed ...
Tópico(s): Geological formations and processes
2015 - National Geology and Mining Service | Andean geology
Stephan Harrison, Neil F. Glasser, Vanessa Winchester, Eleanor Haresign, Charles R. Warren, G.A.T. Duller, Richard M. Bailey, Susan Ivy‐Ochs, Krister N. Jansson, Peter W. Kubik,
... significant recession from nineteenth-century moraine limits. The moraine dates indicate varying retreat rates, in conjunction with significant downwasting. The bathymetry of Lago Leones is characterized by distinct ridges interpreted as moraine ridges that dissect the lake into several basins, ...
Tópico(s): Climate change and permafrost
2008 - SAGE Publishing | The Holocene
Stephen C. Porter, G. Orombelli,
... they were ca. 350 ± 50 m lower. The moraines, not yet closely dated, were deposited sometime after 14,200 14 C Years ago by which time Lago'd Alice near the margin of the würm moraine system at Ivrea had been deglaciated, and before ...
Tópico(s): Geological formations and processes
1982 - Wiley | Boreas
B. Friesen, Christopher J. Cole, David A. Nimick, Earl M. Wilson, M. J. Fahey, Daniel McGrath, J. Leidich,
... GLOFs and the consequent headward erosion continue, the moraine that creates Lago Cachet Uno could be destabilized and breached, and ...
Tópico(s): Climate change and permafrost
2015 - United States Geological Survey | Scientific investigations map
Emanuele Lodolo, Federica Donda, Jorge G. Lozano, Luca Baradello, Roberto Romeo, Donaldo M. Bran, Alejandro Tassone,
... times. Here we show evidence of two subaqueous moraine systems both in the Canal de Los Témpanos and in the Brazo Rico, the two arms of Lago Argentino along which Perito Moreno glacier has flowed over time. These moraines, identified for the first time in the Canal ...
Tópico(s): Climate change and permafrost
2020 - Nature Portfolio | Scientific Reports
Rachel Smedley, Neil F. Glasser, G.A.T. Duller,
... these correspond to the Moreno I and II moraine ridges, which were previously dated using cosmogenic isotope dating to 150 ± 30 ka. Luminescence dating at Lago Buenos Aires has also identified outwash sediments that ... ka which correspond to the Fenix I – V moraine ridges. The combined chronology suggests that glacial advances occurred ∼110 ± 20 ka to 150 ± 30 ka (MIS 6), ∼30.8 ± 5.7 ka to ∼34.0 ± 6.1 ka (MIS 3), and ∼14.7 ± 2.1 to 26.2 ± 1.6 ka (MIS 2) at Lago Buenos Aires. Overall luminescence dating using single grains ...
Tópico(s): Pleistocene-Era Hominins and Archaeology
2016 - Elsevier BV | Quaternary Science Reviews
William C. Mahaney, Michael W. Milner, Volli Kalm, Randy W. Dirszowsky, R. G. V. Hancock, R.P. Beukens,
... 4 ka cal BP. The peat lies on moraine deposited during a stillstand event when the Humboldt Glacier retreated to the area of Lago Verde at ∼ 4000 m a.s.l. Approximately 0.5 km upvalley, toward Lago Suero, YD till buries peat deposited in glaciolacustrine sediments of presumed Late Glacial age. Farther north, in the Mucuñuque–Mucubají Catchment of the eastern cordillera, a push moraine of possible YD age buries older till of ...
Tópico(s): Geological and Tectonic Studies in Latin America
2007 - Elsevier BV | Geomorphology
George H. Denton, Thomas V. Lowell, C. J. Heusser, Christian Schlüchter, Bjørn G. Andersen, Linda E. Heusser, Patricio I. Moreno, D. R. Marchant,
... A Llanquihue-age glacier expansion into the outer moraine belts also occurred more than about 40,000 14 C yr BP for the Lago Llanquihue piedmont glacier.
Tópico(s): Climate change and permafrost
1999 - Taylor & Francis | Geografiska Annaler Series A Physical Geography
Emanuele Lodolo, Jorge G. Lozano, Federica Donda, Donald Bran, Luca Baradello, Alejandro Tassone, Roberto Romeo, Marcelo Paterlini, Maurizio Grossi, Mauro Caffau, J. F. Vilas,
... a series of high-resolution seismic profiles revealing moraine bodies associated with the late-glacial glacier dynamics and the first bathymetric map of the Brazo Rico and Brazo Sur, the two southern arms of Lago Argentino. At the eastern termination of Brazo Rico, we identified at the lake floor the submerged expression of the Puerto Bandera 3 moraine mapped onshore, which represents the oldest event (12, ...
Tópico(s): Cryospheric studies and observations
2020 - Cambridge University Press | Quaternary Research