Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA
We present two hypotheses regarding the evolution of Holocene climate in the Northern Rocky Mountains that stem from a previously unpublished environmental magnetic record from Jones Lake, Montana. First, we link two distinct intervals of fining magnetic grain size (documented by an increasing ratio...
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ftdatacite:10.25384/sage.c.4750712 2023-05-15T17:33:26+02:00 Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA Maxbauer, Daniel P Shapley, Mark D Geiss, Christoph E Ito, Emi 2019 https://dx.doi.org/10.25384/sage.c.4750712 https://sage.figshare.com/collections/Holocene_climate_recorded_by_magnetic_properties_of_lake_sediments_in_the_Northern_Rocky_Mountains_USA/4750712 unknown SAGE Journals https://dx.doi.org/10.1177/0959683619887418 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Geography History Collection article 2019 ftdatacite https://doi.org/10.25384/sage.c.4750712 https://doi.org/10.1177/0959683619887418 2021-11-05T12:55:41Z We present two hypotheses regarding the evolution of Holocene climate in the Northern Rocky Mountains that stem from a previously unpublished environmental magnetic record from Jones Lake, Montana. First, we link two distinct intervals of fining magnetic grain size (documented by an increasing ratio of anhysteretic to isothermal remanent magnetization) to the authigenic production of magnetic minerals in Jones Lake bottom waters. We propose that authigenesis in Jones Lake is limited by rates of groundwater recharge and ultimately regional hydroclimate. Second, at ~8.3 ka, magnetic grain size increases sharply, accompanied by a drop in concentration of magnetic minerals, suggesting a rapid termination of magnetic mineral authigenesis that is coeval with widespread effects of the 8.2 ka event in the North Atlantic. This association suggests a hydroclimatic response to the 8.2 ka event in the Northern Rockies that to our knowledge is not well documented. These preliminary hypotheses present compelling new ideas that we hope will both highlight the sensitivity of magnetic properties to record climate variability and attract more work by future research into aridity, hydrochemical response, and climate dynamics in the Northern Rockies. Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Northern Rockies ENVELOPE(-123.446,-123.446,59.074,59.074) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Geography History |
spellingShingle |
Geography History Maxbauer, Daniel P Shapley, Mark D Geiss, Christoph E Ito, Emi Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA |
topic_facet |
Geography History |
description |
We present two hypotheses regarding the evolution of Holocene climate in the Northern Rocky Mountains that stem from a previously unpublished environmental magnetic record from Jones Lake, Montana. First, we link two distinct intervals of fining magnetic grain size (documented by an increasing ratio of anhysteretic to isothermal remanent magnetization) to the authigenic production of magnetic minerals in Jones Lake bottom waters. We propose that authigenesis in Jones Lake is limited by rates of groundwater recharge and ultimately regional hydroclimate. Second, at ~8.3 ka, magnetic grain size increases sharply, accompanied by a drop in concentration of magnetic minerals, suggesting a rapid termination of magnetic mineral authigenesis that is coeval with widespread effects of the 8.2 ka event in the North Atlantic. This association suggests a hydroclimatic response to the 8.2 ka event in the Northern Rockies that to our knowledge is not well documented. These preliminary hypotheses present compelling new ideas that we hope will both highlight the sensitivity of magnetic properties to record climate variability and attract more work by future research into aridity, hydrochemical response, and climate dynamics in the Northern Rockies. |
format |
Article in Journal/Newspaper |
author |
Maxbauer, Daniel P Shapley, Mark D Geiss, Christoph E Ito, Emi |
author_facet |
Maxbauer, Daniel P Shapley, Mark D Geiss, Christoph E Ito, Emi |
author_sort |
Maxbauer, Daniel P |
title |
Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA |
title_short |
Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA |
title_full |
Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA |
title_fullStr |
Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA |
title_full_unstemmed |
Holocene climate recorded by magnetic properties of lake sediments in the Northern Rocky Mountains, USA |
title_sort |
holocene climate recorded by magnetic properties of lake sediments in the northern rocky mountains, usa |
publisher |
SAGE Journals |
publishDate |
2019 |
url |
https://dx.doi.org/10.25384/sage.c.4750712 https://sage.figshare.com/collections/Holocene_climate_recorded_by_magnetic_properties_of_lake_sediments_in_the_Northern_Rocky_Mountains_USA/4750712 |
long_lat |
ENVELOPE(-123.446,-123.446,59.074,59.074) |
geographic |
Northern Rockies |
geographic_facet |
Northern Rockies |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1177/0959683619887418 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.25384/sage.c.4750712 https://doi.org/10.1177/0959683619887418 |
_version_ |
1766131945938354176 |