Using Be-10 dating to determine when the Cordilleran Ice Sheet stopped flowing over the Canadian Rocky Mountains
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10430191" target="_blank" >RIV/00216208:11310/21:10430191 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=V-jFtzTtiw" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=V-jFtzTtiw</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/qua.2020.122" target="_blank" >10.1017/qua.2020.122</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Using Be-10 dating to determine when the Cordilleran Ice Sheet stopped flowing over the Canadian Rocky Mountains
Popis výsledku v původním jazyce
During the last glacial maximum the Cordilleran and Laurentide ice sheets coalesced east of the Rocky Mountains and geomorphological evidence indicates ice flowed over the main ridge of the Rocky Mountains between similar to 54-56 degrees N. However, this ice flow has thus far remained unconstrained in time. Here we use in situ produced cosmogenic m Be dating to determine when Cordilleran ice stopped flowing over the mountain range. We dated eight samples from two sites: one on the western side (Mount Morfee) and one on the eastern side (Mount Spieker) of the Rocky Mountains. At Mount Spieker, one sample is rejected as an outlier and the remaining three give an apparent weighted mean exposure age of 15.6 +/- 0.6 ka. The four samples at Mount Morfee are well clustered in time and give an apparent weighted mean exposure age of 12.2 +/- 0.4 ka. These ages indicate that Mount Spieker became ice free before the Bolling warming and that the western front of the Rocky Mountains (Mount Morfee) remained in contact with the Cordilleran Ice Sheet until the Younger Dryas.
Název v anglickém jazyce
Using Be-10 dating to determine when the Cordilleran Ice Sheet stopped flowing over the Canadian Rocky Mountains
Popis výsledku anglicky
During the last glacial maximum the Cordilleran and Laurentide ice sheets coalesced east of the Rocky Mountains and geomorphological evidence indicates ice flowed over the main ridge of the Rocky Mountains between similar to 54-56 degrees N. However, this ice flow has thus far remained unconstrained in time. Here we use in situ produced cosmogenic m Be dating to determine when Cordilleran ice stopped flowing over the mountain range. We dated eight samples from two sites: one on the western side (Mount Morfee) and one on the eastern side (Mount Spieker) of the Rocky Mountains. At Mount Spieker, one sample is rejected as an outlier and the remaining three give an apparent weighted mean exposure age of 15.6 +/- 0.6 ka. The four samples at Mount Morfee are well clustered in time and give an apparent weighted mean exposure age of 12.2 +/- 0.4 ka. These ages indicate that Mount Spieker became ice free before the Bolling warming and that the western front of the Rocky Mountains (Mount Morfee) remained in contact with the Cordilleran Ice Sheet until the Younger Dryas.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10508 - Physical geography
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2021
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Quaternary Research
ISSN
0033-5894
e-ISSN
—
Svazek periodika
102
Číslo periodika v rámci svazku
July
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
12
Strana od-do
222-233
Kód UT WoS článku
000675576300017
EID výsledku v databázi Scopus
2-s2.0-85111063852