Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA
The Ziegler Reservoir fossil site near Snowmass Village, Colorado, provides a rare opportunity to examine environmental conditions in the Rocky Mountains during marine isotope stage (MIS) 4 (71–57 ka). Although recognized as a global-scale cold event, MIS 4 is typically absent from Rocky Mountain gl...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Taylor & Francis Group
2021
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Online Access: | https://doi.org/10.1080/15230430.2021.1979167 https://doaj.org/article/8689d28128ff4ab280f287e532d4725a |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:8689d28128ff4ab280f287e532d4725a 2023-05-15T14:14:21+02:00 Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA Jeffrey S. Honke Jeffrey S. Pigati J. Michael Daniels 2021-01-01 https://doi.org/10.1080/15230430.2021.1979167 https://doaj.org/article/8689d28128ff4ab280f287e532d4725a en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2021.1979167 https://doaj.org/article/8689d28128ff4ab280f287e532d4725a undefined Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 252-268 (2021) glacial chronology marine isotope stage 4 rocky mountains ziegler reservoir fossil site geo anthro-bio Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.1080/15230430.2021.1979167 2023-01-22T19:13:47Z The Ziegler Reservoir fossil site near Snowmass Village, Colorado, provides a rare opportunity to examine environmental conditions in the Rocky Mountains during marine isotope stage (MIS) 4 (71–57 ka). Although recognized as a global-scale cold event, MIS 4 is typically absent from Rocky Mountain glacial chronologies because the geologic evidence was covered or destroyed during the subsequent, and more extensive, MIS 2 (Pinedale; 29–14 ka) glaciation. Ziegler Reservoir lies beyond the Pinedale glacial extent, which allowed for the preservation of a long-lived sequence of eolian sediments deposited in a lacustrine environment that spans from late MIS 6 (ca. 140 ka) through early MIS 3 (ca. 55 ka). Sediments dating to MIS 4 exhibit a significant increase in clay-sized particles, suggesting that the source areas, most likely nearby glacio-fluvial deposits, were enriched with fine-grained material at that time. We hypothesize that the elevated clay content was the result of rock flour production by nearby valley glaciers that were active in the Rocky Mountains during MIS 4. The results of our study illustrate how recognizing indirect evidence of glacial activity can result in a more complete record of past climate conditions than what could be achieved by the study of moraines alone. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Unknown Arctic, Antarctic, and Alpine Research 53 1 252 268 |
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Open Polar |
collection |
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op_collection_id |
fttriple |
language |
English |
topic |
glacial chronology marine isotope stage 4 rocky mountains ziegler reservoir fossil site geo anthro-bio |
spellingShingle |
glacial chronology marine isotope stage 4 rocky mountains ziegler reservoir fossil site geo anthro-bio Jeffrey S. Honke Jeffrey S. Pigati J. Michael Daniels Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA |
topic_facet |
glacial chronology marine isotope stage 4 rocky mountains ziegler reservoir fossil site geo anthro-bio |
description |
The Ziegler Reservoir fossil site near Snowmass Village, Colorado, provides a rare opportunity to examine environmental conditions in the Rocky Mountains during marine isotope stage (MIS) 4 (71–57 ka). Although recognized as a global-scale cold event, MIS 4 is typically absent from Rocky Mountain glacial chronologies because the geologic evidence was covered or destroyed during the subsequent, and more extensive, MIS 2 (Pinedale; 29–14 ka) glaciation. Ziegler Reservoir lies beyond the Pinedale glacial extent, which allowed for the preservation of a long-lived sequence of eolian sediments deposited in a lacustrine environment that spans from late MIS 6 (ca. 140 ka) through early MIS 3 (ca. 55 ka). Sediments dating to MIS 4 exhibit a significant increase in clay-sized particles, suggesting that the source areas, most likely nearby glacio-fluvial deposits, were enriched with fine-grained material at that time. We hypothesize that the elevated clay content was the result of rock flour production by nearby valley glaciers that were active in the Rocky Mountains during MIS 4. The results of our study illustrate how recognizing indirect evidence of glacial activity can result in a more complete record of past climate conditions than what could be achieved by the study of moraines alone. |
format |
Article in Journal/Newspaper |
author |
Jeffrey S. Honke Jeffrey S. Pigati J. Michael Daniels |
author_facet |
Jeffrey S. Honke Jeffrey S. Pigati J. Michael Daniels |
author_sort |
Jeffrey S. Honke |
title |
Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA |
title_short |
Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA |
title_full |
Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA |
title_fullStr |
Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA |
title_full_unstemmed |
Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA |
title_sort |
evidence of glacial activity during mis 4 in the rocky mountains, colorado, usa |
publisher |
Taylor & Francis Group |
publishDate |
2021 |
url |
https://doi.org/10.1080/15230430.2021.1979167 https://doaj.org/article/8689d28128ff4ab280f287e532d4725a |
genre |
Antarctic and Alpine Research Arctic |
genre_facet |
Antarctic and Alpine Research Arctic |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 252-268 (2021) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2021.1979167 https://doaj.org/article/8689d28128ff4ab280f287e532d4725a |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2021.1979167 |
container_title |
Arctic, Antarctic, and Alpine Research |
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53 |
container_issue |
1 |
container_start_page |
252 |
op_container_end_page |
268 |
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1766286863974268928 |