Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance
Abstract Stratigraphy and inferred genesis of relict periglacial features east of Waterton‐Glacier Parks provide information on the magnitude of Quaternary climate changes. Periglacial wedges, involutions, patterned ground and soil wedges are locally preserved in pre‐Wisconsinan outwash/ alluvium an...
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crwiley:10.1002/ppp.3430010303 2024-06-02T08:13:11+00:00 Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance Karlstrom, Eric T. 1990 http://dx.doi.org/10.1002/ppp.3430010303 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430010303 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430010303 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 1, issue 3-4, page 221-234 ISSN 1045-6740 1099-1530 journal-article 1990 crwiley https://doi.org/10.1002/ppp.3430010303 2024-05-03T11:01:44Z Abstract Stratigraphy and inferred genesis of relict periglacial features east of Waterton‐Glacier Parks provide information on the magnitude of Quaternary climate changes. Periglacial wedges, involutions, patterned ground and soil wedges are locally preserved in pre‐Wisconsinan outwash/ alluvium and till on a series of erosion surfaces east of the Lewis Range mountain front and in Wisconsinan outwash near Cutbank, Montana. Formation of periglacial wedges required development of perennially frozen ground and mean annual temperatures at least about 10°C below those of today. All the observed relict periglacial features occur within about 20 km of Wisconsinan glacier margins. Strongly weathered, 2+ m thick, pre‐Illinoian palaeosols, also preserved locally on the erosion surfaces, are truncated and/or completely stripped in the areas most affected by cryoturbation. Hence, most of the periglacial features postdate the palaeosols. Stratigraphic and geomorphic relations suggest that the periglacial features formed during at least three glacial/periglacial episodes, probably including the Wisconsinan, Illinoian and a pre‐Illinoian glaciation. Article in Journal/Newspaper Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 1 3-4 221 234 |
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Wiley Online Library |
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English |
description |
Abstract Stratigraphy and inferred genesis of relict periglacial features east of Waterton‐Glacier Parks provide information on the magnitude of Quaternary climate changes. Periglacial wedges, involutions, patterned ground and soil wedges are locally preserved in pre‐Wisconsinan outwash/ alluvium and till on a series of erosion surfaces east of the Lewis Range mountain front and in Wisconsinan outwash near Cutbank, Montana. Formation of periglacial wedges required development of perennially frozen ground and mean annual temperatures at least about 10°C below those of today. All the observed relict periglacial features occur within about 20 km of Wisconsinan glacier margins. Strongly weathered, 2+ m thick, pre‐Illinoian palaeosols, also preserved locally on the erosion surfaces, are truncated and/or completely stripped in the areas most affected by cryoturbation. Hence, most of the periglacial features postdate the palaeosols. Stratigraphic and geomorphic relations suggest that the periglacial features formed during at least three glacial/periglacial episodes, probably including the Wisconsinan, Illinoian and a pre‐Illinoian glaciation. |
format |
Article in Journal/Newspaper |
author |
Karlstrom, Eric T. |
spellingShingle |
Karlstrom, Eric T. Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
author_facet |
Karlstrom, Eric T. |
author_sort |
Karlstrom, Eric T. |
title |
Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
title_short |
Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
title_full |
Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
title_fullStr |
Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
title_full_unstemmed |
Relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
title_sort |
relict periglacial features east of waterton‐glacier parks, alberta and montana, and their palaeoclimatic significance |
publisher |
Wiley |
publishDate |
1990 |
url |
http://dx.doi.org/10.1002/ppp.3430010303 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430010303 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430010303 |
genre |
Permafrost and Periglacial Processes |
genre_facet |
Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 1, issue 3-4, page 221-234 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.3430010303 |
container_title |
Permafrost and Periglacial Processes |
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1 |
container_issue |
3-4 |
container_start_page |
221 |
op_container_end_page |
234 |
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1800736586958110720 |