Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz
Teller Abstract: Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz provide a foundation for understanding the complex manner in which terrain morphology controlled the routing of overflow through the eastern outlets during the lake’s Nipigon Phase (ca. 9400–8000 14C yea...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.468.8518 2023-05-15T16:41:17+02:00 Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz David W. Leverington James T The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.8518 http://www.lacussomniorum.com/leverington_teller_2003_CJES.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.8518 http://www.lacussomniorum.com/leverington_teller_2003_CJES.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.lacussomniorum.com/leverington_teller_2003_CJES.pdf text 2003 ftciteseerx 2016-01-08T07:06:17Z Teller Abstract: Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz provide a foundation for understanding the complex manner in which terrain morphology controlled the routing of overflow through the eastern outlets during the lake’s Nipigon Phase (ca. 9400–8000 14C years BP) and for understanding the causes of outlet-driven declines in lake level during that period. Although flow paths across the divide between the Agassiz and Nipigon basins were numerous, eastward releases from Lake Agassiz to glacial Lake Kelvin (modern Lake Nipigon) were channeled downslope into a relatively small number of major channels that included the valleys of modern Kopka River, Ottertooth Creek, Vale Creek, Whitesand River, Pikitigushi River, and Little Jackfish River. From Lake Kelvin, these waters overflowed into the Superior basin. The numerous lowerings in lake level between stages of the Nipigon Phase, controlled by topography and the position of the retreating southern margin of the Laurentide Ice Sheet, had magnitudes of between 8 and 58 m, although some of these drawdowns may have occurred as multiple individual events that could have been as small as several metres. The total volumes of water released in association with these drops were as great as 8100 km3, and for all Nipigon stages were probably between about 140 and 250 km3 per metre of lowering. The topographic reconstructions demonstrate that Lake Agassiz occupied the area of glacial Lake Nakina (located northeast of modern Lake Nipigon) by the The Pas stage (ca. 8000 14C years BP) and that Lake Agassiz drainage through the Nipigon Text Ice Sheet Unknown Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Jackfish ENVELOPE(-110.902,-110.902,58.434,58.434) |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Teller Abstract: Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz provide a foundation for understanding the complex manner in which terrain morphology controlled the routing of overflow through the eastern outlets during the lake’s Nipigon Phase (ca. 9400–8000 14C years BP) and for understanding the causes of outlet-driven declines in lake level during that period. Although flow paths across the divide between the Agassiz and Nipigon basins were numerous, eastward releases from Lake Agassiz to glacial Lake Kelvin (modern Lake Nipigon) were channeled downslope into a relatively small number of major channels that included the valleys of modern Kopka River, Ottertooth Creek, Vale Creek, Whitesand River, Pikitigushi River, and Little Jackfish River. From Lake Kelvin, these waters overflowed into the Superior basin. The numerous lowerings in lake level between stages of the Nipigon Phase, controlled by topography and the position of the retreating southern margin of the Laurentide Ice Sheet, had magnitudes of between 8 and 58 m, although some of these drawdowns may have occurred as multiple individual events that could have been as small as several metres. The total volumes of water released in association with these drops were as great as 8100 km3, and for all Nipigon stages were probably between about 140 and 250 km3 per metre of lowering. The topographic reconstructions demonstrate that Lake Agassiz occupied the area of glacial Lake Nakina (located northeast of modern Lake Nipigon) by the The Pas stage (ca. 8000 14C years BP) and that Lake Agassiz drainage through the Nipigon |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
David W. Leverington James T |
spellingShingle |
David W. Leverington James T Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz |
author_facet |
David W. Leverington James T |
author_sort |
David W. Leverington |
title |
Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz |
title_short |
Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz |
title_full |
Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz |
title_fullStr |
Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz |
title_full_unstemmed |
Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz |
title_sort |
paleotopographic reconstructions of the eastern outlets of glacial lake agassiz |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.8518 http://www.lacussomniorum.com/leverington_teller_2003_CJES.pdf |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(-110.902,-110.902,58.434,58.434) |
geographic |
Glacial Lake Jackfish |
geographic_facet |
Glacial Lake Jackfish |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
http://www.lacussomniorum.com/leverington_teller_2003_CJES.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.468.8518 http://www.lacussomniorum.com/leverington_teller_2003_CJES.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766031715697950720 |