Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA
Despite the application of radiocarbon dating for more than three decades along the southern margin of the Laurentide Ice Sheet, fundamental questions about the timing of glacial advances remain. For one of its sublobes, the Miami, we undertook areal mapping, detailed lithostratigraphic analysis, an...
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crwiley:10.1111/j.1502-3885.1993.tb00179.x 2024-06-02T08:08:13+00:00 Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA EKBERG, MICHAEL P. LOWELL, THOMAS V. STUCKENRATH, ROBERT 1993 http://dx.doi.org/10.1111/j.1502-3885.1993.tb00179.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1993.tb00179.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1993.tb00179.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 22, issue 3, page 189-204 ISSN 0300-9483 1502-3885 journal-article 1993 crwiley https://doi.org/10.1111/j.1502-3885.1993.tb00179.x 2024-05-03T10:40:12Z Despite the application of radiocarbon dating for more than three decades along the southern margin of the Laurentide Ice Sheet, fundamental questions about the timing of glacial advances remain. For one of its sublobes, the Miami, we undertook areal mapping, detailed lithostratigraphic analysis, and radiocarbon dating to interpret four pulses of ice advance. On top of the undated sediments deposited during the first advance is a major unconformity. The second advance occurred about 20,000 BP and marks the beginning of the late Wisconsin glaciation. A minor recession (more than 30 km) ensued, but plants did not reoccupy the landscape. A third advance of the ice margin produced a stone‐rich lodgement till to within 20 km of the late Wisconsin maximum. The final ice motion only occurred in the northern part of the study area and may be of local extent. Large accumulations of supraglacial gravity flowtills and outwash mark the final ice‐margin retreat. Of these. only the second advance is well dated. This study implies that the number of advances of the ice margin is fewer than previously suggested. Consequently we argue that several of the sublobes across the southern margin of the Laurentide Ice Sheet acted in unison for the interval of 22.000 to 18.000 BP implying ice‐sheet external forcing. Article in Journal/Newspaper Ice Sheet Wiley Online Library Boreas 22 3 189 204 |
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English |
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Despite the application of radiocarbon dating for more than three decades along the southern margin of the Laurentide Ice Sheet, fundamental questions about the timing of glacial advances remain. For one of its sublobes, the Miami, we undertook areal mapping, detailed lithostratigraphic analysis, and radiocarbon dating to interpret four pulses of ice advance. On top of the undated sediments deposited during the first advance is a major unconformity. The second advance occurred about 20,000 BP and marks the beginning of the late Wisconsin glaciation. A minor recession (more than 30 km) ensued, but plants did not reoccupy the landscape. A third advance of the ice margin produced a stone‐rich lodgement till to within 20 km of the late Wisconsin maximum. The final ice motion only occurred in the northern part of the study area and may be of local extent. Large accumulations of supraglacial gravity flowtills and outwash mark the final ice‐margin retreat. Of these. only the second advance is well dated. This study implies that the number of advances of the ice margin is fewer than previously suggested. Consequently we argue that several of the sublobes across the southern margin of the Laurentide Ice Sheet acted in unison for the interval of 22.000 to 18.000 BP implying ice‐sheet external forcing. |
format |
Article in Journal/Newspaper |
author |
EKBERG, MICHAEL P. LOWELL, THOMAS V. STUCKENRATH, ROBERT |
spellingShingle |
EKBERG, MICHAEL P. LOWELL, THOMAS V. STUCKENRATH, ROBERT Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA |
author_facet |
EKBERG, MICHAEL P. LOWELL, THOMAS V. STUCKENRATH, ROBERT |
author_sort |
EKBERG, MICHAEL P. |
title |
Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA |
title_short |
Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA |
title_full |
Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA |
title_fullStr |
Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA |
title_full_unstemmed |
Late Wisconsin glacial advance and retreat patterns in southwestern Ohio, USA |
title_sort |
late wisconsin glacial advance and retreat patterns in southwestern ohio, usa |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1993.tb00179.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1993.tb00179.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1993.tb00179.x |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas volume 22, issue 3, page 189-204 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1993.tb00179.x |
container_title |
Boreas |
container_volume |
22 |
container_issue |
3 |
container_start_page |
189 |
op_container_end_page |
204 |
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1800753415540703232 |