The impact of glacial lake runoff on the goldthwait and champlain seas: The relationship between glacial lake agassiz runoff and the younger dryas

Rodrigues, Cyril G.; Vilks, G

doi:10.1016/0277-3791(94)90009-4

Cited by 45 publications

(31 citation statements)

References 66 publications

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“…This zone remained cold not only because of its ice-proximal setting but also because the Strait of Belle Isle had opened: the Coriolis effect diverts a branch of the Labrador Current through the strait and along the north shore. The oldest dates on marine molluscs from the Champlain Sea exceed 12 ka BP (as much as 12.8 ka) and are plotted here incongruously in glacial Lake Iroquois (Lake St. Lawrence of Rodrigues and Vilks, 1994) and within the ice margin; these dates are considered to be 500-1000 years too old because of the "old water" (meltwater) effect in the Champlain Sea (Anderson, 1987). The samples illustrate, however, that even the earliest invaders here included boreal taxa.…”

Section: Molluscan Zones At 12 Ka Bpmentioning

confidence: 89%

“…The other is one of several dates on a thin bed of shells in a delta that have yielded ages with a variance of about 2000 years that remains unexplained (Gray et al, 1993). the changing discharge into it from the west: from 11-10 ka BP, the entire proglacial lake sequence west to Lake Agassiz drained into the sea via Lake Ontario and the Ottawa Valley (Clayton and Moran, 1982;Teller and Clayton, 1983;Teller, 1985Teller, , 1987Dyke and Prest, 1987;Teller, 1990;Rodrigues and Vilks, 1994). Before 11 ka BP, Lake Agassiz drained via the Mississippi River into the Gulf of Mexico.…”

Section: Molluscan Zones At 10 Ka Bpmentioning

confidence: 99%

“…Thus the faunal changes broadly suggested on Figure 24 and outlined more fully in Table IX are compatible with the history of discharge into the Champlain Sea although they are not necessarily diagnostic of it. However, Rodrigues and Vilks (1994) provided a different analysis of the effects of Agassiz discharge on the Champlain Sea and Gulf of St. Lawrence. They recognized freshening of the Champlain Sea, but only after 10.5 ka BP, and suggested that this could also be explained by shallowing as uplift progressed.…”

Section: Molluscan Zones At 10 Ka Bpmentioning

confidence: 99%

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Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Dyke¹,

Dale²,

McNeely³

2007

gpq

116

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ABSTRACTDated mollusc collections are classified in assemblages to map paleo-faunistic zones. Hiatella arctica and Mya truncata account for almost half the records and comprise a restricted arctic assemblage. Arctic assemblages comprise 70% and arctic-dominated assemblages 80% of the database. Fifteen species dominate but 170 taxa are recorded. At last glacial maximum, the arctic zone extended from the Arctic Ocean to the Grand Banks. The boreal zone in the western Atlantic was compressed. The subarctic zone, which today dominates eastern Canada, was small. The boreal zone was extensive in the eastern Pacific where subarctic and arctic zones were compressed. Zones shifted northward during deglaciation and the arctic zone diversified when Bering Strait submerged 10.5-10.3 ka BP. Western Arctic molluscs during Younger Dryas time indicate shallow waters warmer than present. Major North Atlantic currents were established 9.5-9.0 ka BP. The subarctic zone extended to the head of Baffin Bay and a boreal zone became established in West Greenland 9-8 ka BP, with intensive changes about 8.5 ka BP. We relate the latter to the reduction of Mackenzie River discharge and in sea ice export to the North Atlantic as Laurentide ice withdrew from Mackenzie headwaters. The extended subarctic zone in Baffin Bay persisted until 3 ka BP and then retreated about 1000 km on the Canadian side. Boreal-subarctic molluscs in the Gulf of St. Lawrence before 9.5 ka BP derived from the glacial refugium. High boreal-subarctic molluscs farther north probably migrated from Europe. We postulate that the Labrador Current acts as a one-way valve for mollusc migrations at glacial-interglacial scales.

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Section: Molluscan Zones At 12 Ka Bpmentioning

confidence: 89%

Section: Molluscan Zones At 10 Ka Bpmentioning

confidence: 99%

Section: Molluscan Zones At 10 Ka Bpmentioning

confidence: 99%

See 1 more Smart Citation

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Dyke¹,

Dale²,

McNeely³

2007

gpq

116

View full text Add to dashboard Cite

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“…In the outer St Lawrence Estuary, there is microfaunal and geochemical evidence for hydrological changes, possibly caused by GLA drainage, near the onset of the Younger Dryas ~ 13 ka (Rodrigues and Vilks, 1994;Jones, 1995, de Vernal et al, 1996;Carlson et al 2007). In the central St. Lawrence Lowlands and the Lake Champlain Basin to the south (regions that are closer to the LIS margin and mid-continental proglacial lakes), the evidence is even more convincing.…”

Section: Detection Of Glacial Lake Outburst Events In Near-shore Marimentioning

confidence: 99%

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

Stokes

Tarasov

Blomdin

et al. 2015

Quaternary Science Reviews

148

104

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“…Correlation of the Saint-Narcisse moraine-building event with Younger Dryas cooling was first intuitively suggested by Lasalle (1966) and demonstrated by Hillaire-Marcel and Occhietti (1977). The moraine has since been the focus of several studies on its lateral extent (LaSalle and Elson, 1975;Occhietti, 1980;Govare, 1995;Dionne and Occhietti, 1996), on related facies and paleoenvironmental studies (Gadd, 1971;Rondot, 1974;Lamothe, 1977;Pagé, 1977;Occhietti, 1980;Parent and Occhietti, 1988), on stratigraphy (Occhietti, 1976(Occhietti, , 1980, on chronology (LaSalle and Elson, 1975;Occhietti, 1976Occhietti, , 1980Rodrigues and Vilks, 1994), and on its general significance (LaSalle and Elson, 1975;Occhietti, 1980;HillaireMarcel et al, 1981). The objectives of this article are as follows: (1) synthesize new and existing data on the geology of the Saint-Narcisse Moraine, (2) analyse the 14 C ages available and reconstruct the sequence of phases occurring during the Saint-Narcisse Event in early Younger Dryas time, and (3) present some implications of the Saint-Narcisse Event along the southeastern ice margin of the Laurentide Ice Sheet.…”

Section: Introductionmentioning

confidence: 97%

The Saint-Narcisse morainic complex and early Younger Dryas events on the southeastern margin of the Laurentide Ice Sheet

Occhietti

2010

gpq

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The Saint-Narcisse morainic complex extends over 750 km along the southern margin of the Laurentian Highlands in Québec, north of the St. Lawrence Valley, between the Ottawa and Saguenay Rivers. To the east, the Laurentide Ice Sheet margin was located in the present St. Lawrence Estuary. To the west, the morainic complex is extended 235 km west of the Ottawa River to the Algonquin Highlands, in Ontario. The general outline of the morainic complex comprises large lobes and reentrants, related to major topographic features. In the lower Saint-Maurice River area, the moraine is composed of reworked clay and till and proximal glaciomarine deposits (Yamachiche Diamicton) and melt-out till and ice-marginal outwash (Charette Drift). The Saint-Narcisse Event can be subdivided in several phases: local readvance in low areas, main phase at the origin of the Saint-Narcisse Moraine s.s., melting-out of the marginal ice with compressive structures and large proglacial outwash features, and slow retreat with secondary ridges. The accuracy of the chronological data is limited by several factors: and a floating chronology is proposed. Two landmarks constrain the age and range of duration of the main Saint-Narcisse phase. The main ridge deposition occured after the onset, ca. 12.9 cal ka, of Champlain Sea in the St. Lawrence Valley, and a rapid ice retreat on the southern edge of the Laurentians. It ended before the drawdowm, in the Lake Huron basin, of Glacial Lake Algonquin ca. 12.5 cal ka. The Saint-Narcisse Event is related to the early cold phase of Younger Dryas, as evidenced by other YD ice readvances in Maine, Nova Scotia, and ice cover on the Gaspé Peninsula. It corresponds to a positive change of the budget of the Laurentide Ice Sheet as a result of climate forcing. After a slow ice front retreat during about 900-700 yr, the final phase of YD is marked by the Mars-Batiscan Moraine, located 17 to 70 km north of the Saint-Narcisse Moraine.Le complexe morainique de Saint-Narcisse s’étend sur 750 km le long de la marge méridionale des Laurentides, au Québec, au nord de la vallée du Saint-Laurent, entre l’Outaouais et le Saguenay. Vers l’est, la marge glaciaire était située dans l’estuaire actuel du Saint-Laurent. Vers l’ouest, en Ontario, les formes associées sont suivies dans le massif Algonquin, jusqu’à 235 km de l’Outaouais. Le tracé général du complexe inclut de grands lobes et rentrants liés à la topographie. Dans la basse vallée du Saint-Maurice, la Moraine de Saint-Narcisse est composée de dépôts glaciomarins proximaux, de till et d’argile marine remaniée (Diamicton de Yamachiche) et de till de fusion sur place et de dépôts fluvioglaciaires et juxtaglaciaires (Dépôts de Charette). L’Épisode de Saint-Narcisse est subdivisé en plusieurs phases non nécessairement synchrones sur toute la marge glaciaire: réavancée locale dans les dépressions importantes, phase majeure de stabilisation à l’origine de la Moraine de Saint-Narcisse, fonte sur place indiquée par des structures imbriquées et épandages proglaciaires, puis retra...

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The impact of glacial lake runoff on the goldthwait and champlain seas: The relationship between glacial lake agassiz runoff and the younger dryas

Cited by 45 publications

References 66 publications

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

The Saint-Narcisse morainic complex and early Younger Dryas events on the southeastern margin of the Laurentide Ice Sheet

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