A review and analysis of varve thickness records from glacial Lake Ojibway (Ontario and Quebec, Canada)

Breckenridge, Andy; Lowell, Thomas V.; Stroup, Justin S.; Evans, Gianna

doi:10.1016/j.quaint.2011.09.031

Cited by 40 publications

(48 citation statements)

References 28 publications

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“…The early Holocene was notable for its ice retreat and proglacial lake growth, which included enhanced flow down the Saint Lawrence River and abrupt drainage of proglacial lakes Agassiz and Ojibway into Hudson Bay. In G12, westerly flow around the ice dam in Hudson Bay could highlight a pathway for the 8.6 ka partial drainage of Lake Agassiz-Ojibway (Breckenridge et al, 2012). Many other rivers no longer had ice-sheet input.…”

Section: Resultsmentioning

confidence: 99%

“…While this is a potential source of error, it also may not be such a bad assumption: where there are chronological controls on ice-stream reorganization, these have not been noted to change the continentalscale structure of ice divides (e.g., Stokes et al, 2009;Ross et al, 2009;Ó Cofaigh et al, 2010). Better chronologies often come from direct dating of ice-marginal positions (e.g., Licciardi et al, 1999;Dyke, 2004;Gowan, 2013), fluvial deposits (e.g., Bretz, 1969;Atwater, 1984;Ridge, 1997;Benito and O'Connor, 2003;Knox, 2007;Rittenour et al, 2007), and lacustrine deposits (e.g., Antevs, 1922;Kehew and Teller, 1994;Rayburn et al, 2005Rayburn et al, , 2007Rayburn et al, , 2011Richard and Occhietti, 2005;Breckenridge, 2007;Breckenridge et al, 2012) and these provide the fourth layer to define drainage chronologies. The fifth layer of data comes from the offshore stratigraphic record (e.g., Leventer et al, 1982;Andrews and Tedesco, 1992;Andrews et al, 1999;Flower et al, 2004;Carlson et al, 2007aWilliams et al, 2012;Maccali et al, 2013), which can be compiled into paleohydrographs that may correlate with time-variable drainage basin area , but outside of some information on provenance (Carlson et al, 2007a, it cannot independently indicate where the past drainage basin margins lie.…”

Section: Methods: Data-driven Drainage Reconstructionmentioning

confidence: 99%

“…11. et al, 2012). The second was the 8.2 ka complete drainage of Lake Agassiz-Ojibway (Barber et al, 1999;Breckenridge et al, 2012;Stroup et al, 2013) that is associated with collapse of the Laurentide Ice Sheet saddle that connected the Keewatin and Québec-Labrador domes (Gregoire et al, 2012). High carbonate concentrations and low δ 18 O in sediments indicate consistent high discharge, even between these events, from the start of the Noble Inlet Advance at 9.7 ka until ∼ 8.0 ka .…”

Section: Drainage Histories By Rivermentioning

confidence: 99%

“…Notes on the geologic record can be found in Fig. 11. ridge et al, 2012), and 8.2 ka, when the ice saddle in Hudson Bay collapsed, causing a massive flood that resulted in seasurface freshening and the brief cooling of the 8.2 ka event (Barber et al, 1999;Roy et al, 2011;Hoffman et al, 2012;Gregoire et al, 2012;Breckenridge et al, 2012;Stroup et al, 2013). While this ended meltwater inputs to the Saint Lawrence River, meltwater from the Québec-Labrador dome flowed down the Manicouagan River and into the Gulf of Saint Lawrence until ∼ 7.8 ka (Occhietti et al, 2004).…”

Section: Drainage Histories By Rivermentioning

confidence: 99%

“…The early Holocene in northern North America was characterized by retreat of the Laurentide Ice Sheet that led to expansion of proglacial lakes, setting the stage for the shortlived and rapid 8.2 ka cooling event when the ice dam separating Lake Agassiz-Ojibway and the sea collapsed and the lake rapidly drained into the ocean (Barber et al, 1999;Breckenridge et al, 2012;Gregoire et al, 2012). None of the models perform particularly well at this time, though some observations hold promise.…”

Section: Comparison Of Data and Models For Drainage Basin Extentsmentioning

confidence: 99%

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Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum

Wickert

2016

Earth Surf. Dynam.

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Abstract. Over the last glacial cycle, ice sheets and the resultant glacial isostatic adjustment (GIA) rearranged river systems. As these riverine threads that tied the ice sheets to the sea were stretched, severed, and restructured, they also shrank and swelled with the pulse of meltwater inputs and time-varying drainage basin areas, and sometimes delivered enough meltwater to the oceans in the right places to influence global climate. Here I present a general method to compute past river flow paths, drainage basin geometries, and river discharges, by combining models of past ice sheets, glacial isostatic adjustment, and climate. The result is a time series of synthetic paleohydrographs and drainage basin maps from the Last Glacial Maximum to present for nine major drainage basins -the Mississippi, Rio Grande, Colorado, Columbia, Mackenzie, Hudson Bay, Saint Lawrence, Hudson, and Susquehanna/Chesapeake Bay. These are based on five published reconstructions of the North American ice sheets. I compare these maps with drainage reconstructions and discharge histories based on a review of observational evidence, including river deposits and terraces, isotopic records, mineral provenance markers, glacial moraine histories, and evidence of ice stream and tunnel valley flow directions. The sharp boundaries of the reconstructed past drainage basins complement the flexurally smoothed GIA signal that is more often used to validate ice-sheet reconstructions, and provide a complementary framework to reduce nonuniqueness in model reconstructions of the North American ice-sheet complex.

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Section: Resultsmentioning

confidence: 99%

Section: Methods: Data-driven Drainage Reconstructionmentioning

confidence: 99%

Section: Drainage Histories By Rivermentioning

confidence: 99%

Section: Drainage Histories By Rivermentioning

confidence: 99%

Section: Comparison Of Data and Models For Drainage Basin Extentsmentioning

confidence: 99%

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Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum

Wickert

2016

Earth Surf. Dynam.

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LakeCC: a tool for efficiently identifying lake basins with application to palaeogeographic reconstructions of North America

Hinck

Gowan

Lohmann

2019

J Quaternary Science

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Along the margins of continental ice sheets, lakes formed in isostatically depressed basins during glacial retreat. Their shorelines and extent are sensitive to the ice margin and the glacial history of the region. Proglacial lakes, in turn, also impact the glacial isostatic adjustment due to loading, and ice dynamics by posing a marine‐like boundary condition at the ice margin. In this study we present a tool that efficiently identifies lake basins and the corresponding maximum water level for a given ice sheet and topography reconstruction. This algorithm, called the LakeCC model, iteratively checks the whole map for a set of increasing water levels and fills isolated basins until they overflow into the ocean. We apply it to the present‐day Great Lakes and the results show good agreement (∼1−4%) with measured lake volume and depth. We then apply it to two topography reconstructions of North America between the Last Glacial Maximum and the present. The model successfully reconstructs glacial lakes such as Lake Agassiz, Lake McConnell and the predecessors of the Great Lakes. LakeCC can be used to judge the quality of ice sheet reconstructions. © 2019 The Authors Journal of Quaternary Science Published by John Wiley & Sons Ltd.

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Age of Gimli beach of Lake Agassiz based on new OSL dating

Teller

Owen

2020

J Quaternary Science

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Gimli beach in Manitoba is one of the lowest elevation beaches in the southern Lake Agassiz basin, and is a distinct ridge composed of bedded sand and gravel that rises above the lake plain and extends for more than 40 km. Ten new optically stimulated luminescence (OSL) ages from Gimli beach yield ages mostly ranging from 9.7 ± 0.7 to 10.5 ± 0.8 ka (average 10.3 ± 0.5 ka), which is older by 0.6 to >1.0 ka than age estimates of previous researchers. Two of our new OSL ages are notably older than the others, dating to~11.3 ± 0.8 and 13.9 ± 1.0 ka, which we attribute to poorly bleached sands. We ascribe an age of about 10 ka to Gimli beach, which is several centuries before overflow from Lake Agassiz and its vast drainage basin shifted from the western Great Lakes to glacial Lake Ojibway and the St. Lawrence Valley.

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A review and analysis of varve thickness records from glacial Lake Ojibway (Ontario and Quebec, Canada)

Cited by 40 publications

References 28 publications

Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum

Reconstruction of North American drainage basins and river discharge since the Last Glacial Maximum

LakeCC: a tool for efficiently identifying lake basins with application to palaeogeographic reconstructions of North America

Age of Gimli beach of Lake Agassiz based on new OSL dating

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