Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy
Abstract In an area north of the Giants Range in northeastern Minnesota the late Wisconsin glacial and extraglacial lithostratigraphy shows that, apart from one occurrence of red clayey till, the deposits can be related to the deglaciation of the Rainy Lobe, the margin of which retreated northward,...
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Cambridge University Press (CUP)
1990
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crcambridgeupr:10.1016/0033-5894(90)90082-v 2024-06-09T07:50:02+00:00 Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy Björck, Svante 1990 http://dx.doi.org/10.1016/0033-5894(90)90082-v http://api.elsevier.com/content/article/PII:003358949090082V?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090082V?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020391 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 33, issue 1, page 18-36 ISSN 0033-5894 1096-0287 journal-article 1990 crcambridgeupr https://doi.org/10.1016/0033-5894(90)90082-v 2024-05-15T13:17:34Z Abstract In an area north of the Giants Range in northeastern Minnesota the late Wisconsin glacial and extraglacial lithostratigraphy shows that, apart from one occurrence of red clayey till, the deposits can be related to the deglaciation of the Rainy Lobe, the margin of which retreated northward, leaving debris-rich ice behind. By a combination of pollen stratigraphy, lithostratigraphy, and chronostratigraphy of lake sediments in this area, together with multivariate numerical analyses of the data set, a “hiatus” stratigraphy was set up. Combined with the glacial and extraglacial stratigraphy, it shows that the area of Glacial Lake Norwood was possibly later filled with sediments, between masses of stagnant ice, following a damming of drainge in the south by the St. Louis Sublobe. The area was drained through the Embarrass channel when the St. Louis Sublobe retreated. Then followed the drainage of Lake Koochiching through the Embarrass channel. At ca. 10,200 14 C yr B.P. the area apparently became free of stagnant ice as normal lake sedimentation began in all lakes studied. A lake-level rise is indicated ca. 1000 yr later. Apart from a long-lasting phase of birch tundra parkland between ca. 12,000 (or 11,500?) and 10,600 14 C yr B.P., the general pollen stratigraphy fits into the regional picture with a more or less undisturbed and gradual plant immigration from the time of the culmination of the St. Louis Sublobe. Article in Journal/Newspaper Tundra Cambridge University Press Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) St. Louis ENVELOPE(-67.496,-67.496,-67.132,-67.132) Parkland ENVELOPE(-120.570,-120.570,55.917,55.917) Quaternary Research 33 1 18 36 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract In an area north of the Giants Range in northeastern Minnesota the late Wisconsin glacial and extraglacial lithostratigraphy shows that, apart from one occurrence of red clayey till, the deposits can be related to the deglaciation of the Rainy Lobe, the margin of which retreated northward, leaving debris-rich ice behind. By a combination of pollen stratigraphy, lithostratigraphy, and chronostratigraphy of lake sediments in this area, together with multivariate numerical analyses of the data set, a “hiatus” stratigraphy was set up. Combined with the glacial and extraglacial stratigraphy, it shows that the area of Glacial Lake Norwood was possibly later filled with sediments, between masses of stagnant ice, following a damming of drainge in the south by the St. Louis Sublobe. The area was drained through the Embarrass channel when the St. Louis Sublobe retreated. Then followed the drainage of Lake Koochiching through the Embarrass channel. At ca. 10,200 14 C yr B.P. the area apparently became free of stagnant ice as normal lake sedimentation began in all lakes studied. A lake-level rise is indicated ca. 1000 yr later. Apart from a long-lasting phase of birch tundra parkland between ca. 12,000 (or 11,500?) and 10,600 14 C yr B.P., the general pollen stratigraphy fits into the regional picture with a more or less undisturbed and gradual plant immigration from the time of the culmination of the St. Louis Sublobe. |
format |
Article in Journal/Newspaper |
author |
Björck, Svante |
spellingShingle |
Björck, Svante Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy |
author_facet |
Björck, Svante |
author_sort |
Björck, Svante |
title |
Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy |
title_short |
Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy |
title_full |
Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy |
title_fullStr |
Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy |
title_full_unstemmed |
Late Wisconsin History North of the Giants Range, Northern Minnesota, Inferred from Complex Stratigraphy |
title_sort |
late wisconsin history north of the giants range, northern minnesota, inferred from complex stratigraphy |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1016/0033-5894(90)90082-v http://api.elsevier.com/content/article/PII:003358949090082V?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090082V?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020391 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(-67.496,-67.496,-67.132,-67.132) ENVELOPE(-120.570,-120.570,55.917,55.917) |
geographic |
Glacial Lake St. Louis Parkland |
geographic_facet |
Glacial Lake St. Louis Parkland |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Quaternary Research volume 33, issue 1, page 18-36 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(90)90082-v |
container_title |
Quaternary Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
18 |
op_container_end_page |
36 |
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1801383008951861248 |