Glacial Lake Whittlesey: the probable ice frontal position in the eastern end of the Erie basin

1979 ◽  
Vol 16 (3) ◽  
pp. 568-574 ◽  
Author(s):  
Peter J. Barnett
Keyword(s):  
Lake Erie ◽  
Plane Curve ◽  
Glacial Lake ◽  
Glacial Ice ◽  
Data Points ◽  
Glacial Advance

Glacial Lake Whittlesey is related to the glacial advance during the Port Huron Stadial, approximately 13 000 radiocarbon years BP. This episode has previously been thought to be represented, in the eastern end of the Lake Erie basin, by the Paris and Galt Moraines and the deposition of the Wentworth Till in southern Ontario.However, the location of Whittlesey shoreline features suggests that this lake existed during the subsequent advance which deposited the Halton Till. A 'Halton' ice-contact delta, at Summit, Ontario, coincides with the Lake Whittlesey water plane curve constructed from 72 data points around Lakes Huron and Erie.It is suggested, therefore, that the glacial ice advance represented by the Halton Till, based on its relationship to Lake Whittlesey, has an age of about 13 000 radiocarbon years BP (Port Huron Stadial) and that the Wentworth Till (Paris and Galt Moraines) is of Port Bruce Stadial age.

Un lac glaciaire dans la région du lac Minto—Nouveau-Québec

1983 ◽  
Vol 20 (9) ◽  
pp. 1488-1492 ◽  
Author(s):  
Bernard Lauriol ◽  
James T. Gray
Keyword(s):  
Main Part ◽  
River Valley ◽  
Glacial Lake ◽  
Glacial Ice ◽  
Isostatic Rebound ◽  
Raised Beaches

The presence of raised beaches around Lake Minto, northern Quebec, and the washing of till in the upper part of the Leaf River valley are attributed to the existence of a glacial lake. It drained westward into the Tyrrell Sea and was dammed in the east by glacial ice that occupied the main part of the Leaf River valley. The disappearance of this ice prior to 5200 years BP led to rapid drainage of the glacial lake into an arm of the D'Iberville Sea. Postglacial isostatic rebound has subsequently led to warping of the highest water plane associated with this glacial lake, as well as those of the postglacial seas.

scholarly journals Chronology and Stratigraphy of the Imlay channel in Lapeer County, Michigan, USA

2021 ◽  
Author(s):  
Jonathan N. Luczak ◽  
Timothy G. Fisher ◽  
Kenneth Lepper
Keyword(s):  
Cross Sections ◽  
Lake Erie ◽  
Early Holocene ◽  
Glacial Lake ◽  
Sedimentation Rates ◽  
Alluvial Fans ◽  
Radiocarbon Age ◽  
The Past ◽  
Water Well ◽  
A Current

The Imlay channel in Lapeer County, Michigan was one of two outlets for the glacial Lake Maumee phase of ancestral Lake Erie. Fifteen new radiocarbon and optical ages from within and adjacent to the Imlay channel constrain sedimentation rates within the channel and the timing of regional deglaciation. For nearly 50 years the deglaciation of this region of Michigan has been based on a single age from the Weaver Drain site located near the Imlay channel, and a new radiocarbon age of 16.7–17.0 cal ka BP from 3 km east of the Imlay channel supports this long-standing deglacial age. On average there is a 14 m thick sediment fill within the channel. Radiocarbon and OSL ages reveal that much of the alluvial fill was deposited by 14.9 ka, and alluvial fans building into the channel stabilized in the early Holocene. Cross-sections along and perpendicular to the Imlay channel, built from geotechnical borings and water-well records, reveal a current-day bedrock sill elevation at 235 masl that would have permitted drainage of all stages of glacial Lake Maumee in the past.

scholarly journals ANALYSIS AND CHRONOLOGY OF GLACIAL LAKE ARKONA IN THE WESTERN LAKE ERIE BASIN, USA

2018 ◽  
Author(s):  
John Dilworth ◽  
◽  
David Krantz ◽  
Timothy G. Fisher ◽  
Donald Stierman
Keyword(s):  
Lake Erie ◽  
Glacial Lake ◽  
Western Lake ◽  
Western Lake Erie

Late Quaternary palaeoenvironments in Prydz Bay, East Antarctica: interpretations from marine diatoms

2003 ◽  
Vol 15 (4) ◽  
pp. 512-521 ◽  
Author(s):  
FIONA TAYLOR ◽  
AMY LEVENTER
Keyword(s):  
Late Quaternary ◽  
Sediment Cores ◽  
Prydz Bay ◽  
Silty Clay ◽  
Ice Shelf ◽  
Glacial Ice ◽  
Amery Ice Shelf ◽  
Age Model ◽  
New Interpretation ◽  
Glacial Advance

Fossil diatom-bearing marine sediment cores recovered from Prydz Channel, Prydz Bay, record episodes of glacial advance and retreat in the bay. Diatom frustules are abundant, well preserved, and the species composition is diverse in two biogenic sediment units composed of siliceous diatom ooze (SMO-1 and SMO-2). Between SMO-1 and SMO-2 a terrigenous unit (T) is present, composed of muddy diamicton and sandy silty clay, which contains poorly preserved rare diatoms. The SMO units are interpreted to represent an open marine setting with seasonal sea ice cover; the T unit is interpreted to represent glacial ice expansion from the Amery Ice Shelf over the site. Based on an age model developed previously for other cores from Prydz Channel with analogous stratigraphies, we interpret our record to be late Quaternary through Holocene in age. The T unit records the Last Glacial Maximum (LGM) in Prydz Bay; the SMO-1 and SMO-2 units record interstadial episodes that are post- and pre-LGM respectively. Extinct diatom taxa in the T and SMO-2 units indicate reworked sediment sourced from two different-aged deposits. Our results provide both a new interpretation of late Quaternary deposition in Prydz Channel and support for previous studies in this region.

Late Pleistocene proboscideans and early Fraser glacial sedimentation in eastern Fraser Lowland, British Columbia

1982 ◽  
Vol 19 (5) ◽  
pp. 899-906 ◽  
Author(s):  
Stephen R. Hicock ◽  
Keith Hobson ◽  
John E. Armstrong
Keyword(s):  
British Columbia ◽  
Late Pleistocene ◽  
Silty Sand ◽  
Glacial Lake ◽  
Glacial Ice ◽  
Strait Of Georgia ◽  
The North ◽  
North Side ◽  
History Of ◽  
Glacial Sedimentation

Three recently radiocarbon-dated tusk segments from eastern Fraser Lowland indicate Pleistocene proboscideans (probably mammoths) lived there between 22 700 and 21 400 years ago during early Fraser (for the Fraser Lowland) ice advance into the area. Palynomorphs from silty sand adhering to a tusk indicate the animals grazed on open grassy floodplain. Sedimentologic and altimeter studies of tusk-bearing gravel indicate an early Fraser sandur, at least 10 km long and deposited at the same time as Coquitlam Drift, formed in Chilliwack Valley at the same time that a sandur or kame terrace was deposited against the north side of Promontory ridge. Probably about 21 000 years ago (the time of Coquitlam glacial maximum in western Fraser Lowland) ice blocked Chilliwack Valley, creating a glacial lake whose freshwater, Pediastrum-bearing, laminated silt has been observed up to 200 m asl. Stratigraphy and history of the area following deposition of the above gravels and silt are still uncertain without more chronologic control. However, proboscideans could have migrated southward and westward, away from ice advancing into Fraser Lowland, across ancestral Strait of Georgia via the Quadra sandur, and onto southeastern Vancouver Island to which earliest Fraser glacial ice probably advanced after 17 000 years BP.

scholarly journals Glacial Features of Tanquary Fiord and Adjoining Areas of Northern Ellesmere Island, N.W.T.

1969 ◽  
Vol 8 (52) ◽  
pp. 23-50 ◽  
Author(s):  
G. Hattersley-Smith
Keyword(s):  
Ellesmere Island ◽  
Glacial Lake ◽  
Terminal Position ◽  
Glacial Ice ◽  
Ice Caps ◽  
Bathymetric Data ◽  
Long Period ◽  
River Erosion ◽  
Study Support ◽  
Lake Deposits

The results of the present study support the conclusion that the former ice cover of northern Ellesmere Island was very much more extensive than the present, although the age of maximum glaciation is not known. In the Tanquary Fiord area the conclusion is based on bathymetric data indicating considerable overdeepening of the fiords; morphology of the main valleys; and the presence of moraines, erratics and glacial lake deposits at high levels. Tanquary Fiord became free of glacial ice at least 6 500 years ago and peat was forming in the valleys by this time. A long period of river erosion followed the main retreat of the ice. Subsequently, and within the last 4 000 years, glaciers advanced to re-occupy V-shaped valleys, and at the same time small ice caps were probably regenerated. In the last 900 years, however, there has been little change in the terminal position of most of the major glaciers, which appear to be advancing slightly, although in the last 40 years the side glaciers have receded from well-marked terminal moraines.

scholarly journals Assessing statistical and spatial validity of sediment survey design and sampling densities: examples from Lake Erie

2018 ◽  
Vol 53 (3) ◽  
pp. 118-132
Author(s):  
Danielle E. Mitchell ◽  
K. Wayne Forsythe ◽  
Chris H. Marvin ◽  
Debbie A. Burniston
Keyword(s):  
Spatial Interpolation ◽  
Lake Erie ◽  
Survey Design ◽  
Original Data ◽  
Original Dataset ◽  
Sampling Locations ◽  
Data Density ◽  
Data Points ◽  
Procedural Costs ◽  
Point Data

Abstract Spatial interpolation methods translate sediment contamination point data into informative area-based visualizations. Lake Erie was first sampled in 1971 based on a survey grid of 263 locations. Due to procedural costs, the 2014 survey was reduced to 34 sampling locations mostly located in deep offshore regions of the lake. Using the 1971 dataset, this study identifies the minimum sampling density at which statistically valid, and spatially accurate predictions can be made using ordinary kriging. Randomly down-sampled subsets at 10% intervals of the 1971 survey were created to include at least one set of data points with a smaller sample size than that of the 2014 dataset. Regression analyses of predicted contamination values assessed spatial autocorrelation between kriged surfaces created from the down-sampled subsets and the original dataset. Subsets at 10% and 20% of the original data density accurately predicted 51% and 75% (respectively) of the original dataset's predictions. Subsets representing 70%, 80% and 90% of the original data density accurately predicted 88%, 90% and 97% of the original dataset's predictions. Although all subsets proved to be statistically valid, sampling densities below 0.002 locations/km2 are likely to create very generalized contamination maps from which environmental decisions might not be justified.

The Wisconsinan deglaciation, of southern Saskatchewan and adjacent areas

1979 ◽  
Vol 16 (4) ◽  
pp. 913-938 ◽  
Author(s):  
E. A. Christiansen
Keyword(s):  
North Dakota ◽  
Phase 1 ◽  
Glacial Lake ◽  
Glacial History ◽  
Glacial Meltwater ◽  
The North ◽  
Lake Deposits ◽  
Glacial Advance

The Wisconsinan deglaciation of southern Saskatchewan and adjacent areas of Alberta, Manitoba, Montana, and North Dakota is depicted in nine phases of glacial advance, readvance, and retreat. Althouth there is some uncertainty whether Phase 1 or 2 represents the Classical Wisconsin (Woodfordian) terminus, the glacial history from about 17 000–10 000 years ago is considered.Although the glacier margin retreated at an increasing rate in Saskatchewan, the volume of meltwater released by the melting glacier decreased with time. The large meltwater channels south of the Cypress Hills as compared to those to the north and the fact that most of the glacial lake deposits north of the Cypress Hills came from extraglacial rivers suggest there was much more glacial meltwater activity south of the Cypress Hills than north of them. This in turn suggests that much of the ice melted before significant retreat of the ice front took place.

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