Un mouvement glaciaire vers le nord-ouest dans la région de Saint-Godefroi, Gaspésie, Québec

1985 ◽  
Vol 22 (12) ◽  
pp. 1871-1877 ◽  
Author(s):  
Pierre Bail
Keyword(s):  
The South ◽  
Last Glacial ◽  
Outwash Plain ◽  
Late Wisconsinan ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula ◽  
The Last Glacial

The last glacial event in the Saint Godefroi area (Gaspé Peninsula) was a glacier from the southeast that was flowing towards the northwest before it stopped at the margin of the Saint Jogues Plateau. This interpretation is based on the following features: distribution of erratic boulders, till fabrics, a frontal moraine, and an outwash plain turned towards north. According to the study of the area located to the south of the Baie des Chaleurs, the glacier probably flowed at the beginning of the late Wisconsinan and disappeared before 14 000 years BP. [Journal Translation]

The relative influence of Laurentide and local ice sheets during the last glacial maximum in the eastern Chic-Chocs Range, northern Gaspé Peninsula, Quebec

2007 ◽  
Vol 44 (11) ◽  
pp. 1603-1625 ◽  
Author(s):  
Pawel Olejczyk ◽  
James T Gray
Keyword(s):  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Last Glacial ◽  
Ice Caps ◽  
Ice Cap ◽  
The North ◽  
Gaspe Peninsula ◽  
The Last Glacial Maximum ◽  
Gaspé Peninsula ◽  
The Last Glacial

Geochemical signatures, erratic dispersal, and striae indicate glacial flows in the north-central Gaspé Peninsula exclusively from Appalachian sources, except for the coastal fringe. During the last glacial maximum (LGM), ice from the Monts McGerrigle flowed northward and northwestward over the summits of the eastern Chic-Chocs Range and the coastal plateau to the Gulf of St. Lawrence. Lesser flows also occurred to the north from Mont Albert and the western Chic-Chocs Range. Where intersecting striae were noted, the older flows are associated with a locally developed ice cap. The rare occurrences of striae and erratics, and morphometric and lithological characteristics of summit diamictons, imply limited basal erosion by both local and regional ice caps. This is postulated to result from early protection of rock surfaces by the initial buildup of thin, frozen-based ice in the eastern Chic-Chocs Range. A compact till mantle in the cols and on the coastal plateau and striae parallel to col directions indicate a downslope transition to wet-based ice. Occasional gneiss boulders above the marine limit between Cap-Chat and Sainte-Anne-des-Monts indicate a slight onlap of the Laurentide Ice Sheet (LIS), but the latter was excluded from the interior of the peninsula east of Cap-Chat. Whole-rock geochemistry from three granitoid erratics on Chic-Chocs summits and one in the York River basin indicates a local Devonian rather than a Precambrian Canadian Shield source. The absence of southward downwarping of synchronous postglacial marine limits across the Gaspé Peninsula corroborates this view for the LGM.

Baetisca (Ephemeroptera: Baetiscidae) from the western interior of Canada with notes on the life cycle

1972 ◽  
Vol 50 (7) ◽  
pp. 1015-1017 ◽  
Author(s):  
D. M. Lehmkuhl
Keyword(s):  
Life Cycle ◽  
Drainage System ◽  
The South ◽  
Glacial Retreat ◽  
Last Glacial ◽  
The North ◽  
South Saskatchewan River ◽  
Dispersal Routes ◽  
The Last Glacial

The distributions of Baetisca obesa (Say) and B. bajkovi Neave in Canada are extended west to Saskatchewan and Alberta. Generic features of adults and nymphs and specific characters of the nymphs of the two species are illustrated. In the South Saskatchewan River nymphs of B. bajkovi hatch from the egg in August and September, they pass the winter under the ice, and adults emerge the following June and July. The Hudson's Bay drainage system was probably invaded by these species from the Mississippi drainage system during the last glacial retreat, since at various times dispersal routes in the form of rivers have been present from the southern refugium for migration to the north.

High-Latitude Forcing of the South American Summer Monsoon During the Last Glacial

Science ◽  
2012 ◽  
Vol 335 (6068) ◽  
pp. 570-573 ◽  
Author(s):  
L. C. Kanner ◽  
S. J. Burns ◽  
H. Cheng ◽  
R. L. Edwards
Keyword(s):  
Summer Monsoon ◽  
High Latitude ◽  
South American ◽  
The South ◽  
Last Glacial ◽  
The Last Glacial

scholarly journals Origin of last-glacial loess in the western Yukon-Tanana Upland, central Alaska, USA

2018 ◽  
Vol 89 (3) ◽  
pp. 797-819 ◽  
Author(s):  
Daniel R. Muhs ◽  
Jeffrey S. Pigati ◽  
James R. Budahn ◽  
Gary L. Skipp ◽  
E. Arthur Bettis ◽  
...  
Keyword(s):  
Drainage Basin ◽  
Coarse Grained ◽  
Geochemical Data ◽  
Glacial Period ◽  
The South ◽  
Last Glacial Period ◽  
Last Glacial ◽  
Recent Climate ◽  
Loess Deposits ◽  
The Last Glacial

AbstractLoess is widespread over Alaska, and its accumulation has traditionally been associated with glacial periods. Surprisingly, loess deposits securely dated to the last glacial period are rare in Alaska, and paleowind reconstructions for this time period are limited to inferences from dune orientations. We report a rare occurrence of loess deposits dating to the last glacial period, ~19 ka to ~12 ka, in the Yukon-Tanana Upland. Loess in this area is very coarse grained (abundant coarse silt), with decreases in particle size moving south of the Yukon River, implying that the drainage basin of this river was the main source. Geochemical data show, however, that the Tanana River valley to the south is also a likely distal source. The occurrence of last-glacial loess with sources to both the south and north is explained by both regional, synoptic-scale winds from the northeast and opposing katabatic winds that could have developed from expanded glaciers in both the Brooks Range to the north and the Alaska Range to the south. Based on a comparison with recent climate modeling for the last glacial period, seasonality of dust transport may also have played a role in bringing about contributions from both northern and southern sources.

scholarly journals Changes in Deep Water Oxygenation of the South China Sea Since the Last Glacial Period

2018 ◽  
Vol 45 (17) ◽  
pp. 9058-9066 ◽  
Author(s):  
Gang Li ◽  
Harunur Rashid ◽  
Lifeng Zhong ◽  
Xing Xu ◽  
Wen Yan ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Water ◽  
The South China Sea ◽  
Glacial Period ◽  
The South ◽  
Last Glacial Period ◽  
China Sea ◽  
Last Glacial ◽  
The Last Glacial
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