scholarly journals The upper beaches and deltas of the glacial lake Agassiz

10.3133/b39 ◽  
1887 ◽  
Keyword(s):  
Glacial Lake ◽  
Lake Agassiz ◽  
Glacial Lake Agassiz

Postglacial Diatom Stratigraphy in Relation to the Recession of Glacial Lake Agassiz

1975 ◽  
Vol 5 (4) ◽  
pp. 529-540 ◽  
Author(s):  
J.C. Ritchie ◽  
L.K. Koivo
Keyword(s):  
Sandy Beach ◽  
Sedimentary Environment ◽  
Glacial Lake ◽  
Lake Agassiz ◽  
Organic Detritus ◽  
Sedimentary Environments ◽  
Grand Rapids ◽  
Glacial Lake Agassiz ◽  
Diatom Stratigraphy ◽  
Beach Sands

The sediment and diatom stratigraphy of a small pond on The Pas moraine, near Grand Rapids, Manitoba, reveals a change in sedimentary environment related directly to the last stages of Glacial Lake Agassiz. Beach sands were replaced by clay 7300 14C y. a., then by organic silt and, at 4000 14C y. a. by coarse organic detritus; the corresponding diatom assemblages were (I) a predominantly planktonic spectrum in beach sands, (II) a rich assemblage of nonplanktonic forms, and (III) a distinctly nonplanktonic acidophilous spectrum. These results confirm Elson's (1967) reconstruction of the extent and chronology of the final (Pipun) stage of Glacial Lake Agassiz. The sedimentary environments change from a sandy beach of a large lake at 7300 BP to a small, shallow eutrophic pond with clay and silt deposition from 7000 to 4000 BP. From 4000 BP to the present, organic detritus was deposited in a shallow pond that tended toward dystrophy.

Micromorphology of iceberg scour in clays: Glacial Lake Agassiz, Manitoba, Canada

2012 ◽  
Vol 55 ◽  
pp. 125-144 ◽  
Author(s):  
Lorna D. Linch ◽  
Jaap J.M. van der Meer ◽  
John Menzies
Keyword(s):  
Glacial Lake ◽  
Lake Agassiz ◽  
Glacial Lake Agassiz ◽  
Iceberg Scour

Thunder Bay, Ontario, was not a pathway for catastrophic floods from Glacial Lake Agassiz

2012 ◽  
Vol 260 ◽  
pp. 98-105 ◽  
Author(s):  
E.B. Voytek ◽  
S.M. Colman ◽  
N.J. Wattrus ◽  
J.L. Gary ◽  
C.F.M. Lewis
Keyword(s):  
Glacial Lake ◽  
Lake Agassiz ◽  
Thunder Bay ◽  
Glacial Lake Agassiz

Glacial Lake Agassiz

Endeavour ◽  
1984 ◽  
Vol 8 (4) ◽  
pp. 211
Author(s):  
R.W Duck
Keyword(s):  
Glacial Lake ◽  
Lake Agassiz ◽  
Glacial Lake Agassiz

A summary of 19th and early 20th Century researchers of glacial Lake Agassiz, North America: from Noah's Flood to Upham's bathtub and beyond

2014 ◽  
Vol 33 (2) ◽  
pp. 214-226
Author(s):  
Beth Johnson
Keyword(s):  
Laurentide Ice Sheet ◽  
Glacial Lake ◽  
Early 20Th Century ◽  
Ancient Lakes ◽  
Ancient Lake ◽  
Lake Agassiz ◽  
Proglacial Lakes ◽  
Glacial Lake Agassiz ◽  
Lake History ◽  
The U.S

During the last North American deglaciation, meltwater collected along the margins of the Laurentide Ice Sheet in proglacial lakes, the largest of these being glacial Lake Agassiz, which existed for over five thousand years starting ~13,950 cal. years B.P. Lake Agassiz was first described in 1823 by mineralogist William H. Keating of the Long Expedition at a time when diluvianism was often used to explain ancient lakes. Subsequent researchers also recognized the existence of an ancient lake, but the first connections of this lake to a possible glacial source came in 1873. Starting in 1879, Warren Upham spent the next fifteen years researching and publishing on Lake Agassiz, eventually publishing his seminal work, the U.S. Geological Survey's Monograph 25 The Glacial Lake Agassiz. Some of Upham's interpretations were later challenged by William A. Johnston, who favored a more complex lake history.

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