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Dynamic Holocene glacial history of St. Jonsfjorden, Svalbard

Farnsworth, Wesley R.; Ingólfsson, Ólafur; Noormets, Riko; Allaart, Lis; Alexanderson, Helena LU ; Henriksen, Mona and Schomacker, Anders LU (2017) In Boreas 46(3). p.585-603
Abstract

Evidence of a dynamic Holocene glacial history is preserved in the terrestrial and marine archives of St. Jonsfjorden, a small fjord-system on the west coast of Spitsbergen, Svalbard. High-resolution, remotely sensed imagery from marine and terrestrial environments was used to construct geomorphological maps that highlight an intricate glacial history of the entire fjord-system. The geomorphology and stratigraphy indicate an early Holocene local glacier advance constrained to the Lateglacial–early Holocene transition. Identification and 14C dating of the thermophilous bivalve mollusc Modiolus modiolus to 10.0±0.12 cal. ka BP suggest a rapid northward migration of the species shortly after deglaciation. Further evidence... (More)

Evidence of a dynamic Holocene glacial history is preserved in the terrestrial and marine archives of St. Jonsfjorden, a small fjord-system on the west coast of Spitsbergen, Svalbard. High-resolution, remotely sensed imagery from marine and terrestrial environments was used to construct geomorphological maps that highlight an intricate glacial history of the entire fjord-system. The geomorphology and stratigraphy indicate an early Holocene local glacier advance constrained to the Lateglacial–early Holocene transition. Identification and 14C dating of the thermophilous bivalve mollusc Modiolus modiolus to 10.0±0.12 cal. ka BP suggest a rapid northward migration of the species shortly after deglaciation. Further evidence enhances the understanding of the onset and subsequent climax of the Neoglacial-Little Ice Age in inner St. Jonsfjorden. The present-day terminus of Osbornebreen, the dominating glacier system in St. Jonsfjorden, is located over 8.5 km up-fjord from its Neoglacial maximum extent. Cross-cutting relationships suggest subsequent advances of all the smaller glaciers in the area following the break-up of Osbornebreen. Glacial deposits, landforms and their cross-cutting relationships observed in both terrestrial and marine settings imply a complex and highly dynamic environment through the later part of the Holocene.

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organization
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type
Contribution to journal
publication status
published
subject
in
Boreas
volume
46
issue
3
pages
19 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85021227797
  • wos:000404144500014
ISSN
0300-9483
DOI
10.1111/bor.12269
language
English
LU publication?
yes
id
1ca2e5e6-24da-4796-905d-57964c59c431
date added to LUP
2017-07-11 11:16:56
date last changed
2018-01-07 12:11:16
@article{1ca2e5e6-24da-4796-905d-57964c59c431,
  abstract     = {<p>Evidence of a dynamic Holocene glacial history is preserved in the terrestrial and marine archives of St. Jonsfjorden, a small fjord-system on the west coast of Spitsbergen, Svalbard. High-resolution, remotely sensed imagery from marine and terrestrial environments was used to construct geomorphological maps that highlight an intricate glacial history of the entire fjord-system. The geomorphology and stratigraphy indicate an early Holocene local glacier advance constrained to the Lateglacial–early Holocene transition. Identification and <sup>14</sup>C dating of the thermophilous bivalve mollusc Modiolus modiolus to 10.0±0.12 cal. ka BP suggest a rapid northward migration of the species shortly after deglaciation. Further evidence enhances the understanding of the onset and subsequent climax of the Neoglacial-Little Ice Age in inner St. Jonsfjorden. The present-day terminus of Osbornebreen, the dominating glacier system in St. Jonsfjorden, is located over 8.5 km up-fjord from its Neoglacial maximum extent. Cross-cutting relationships suggest subsequent advances of all the smaller glaciers in the area following the break-up of Osbornebreen. Glacial deposits, landforms and their cross-cutting relationships observed in both terrestrial and marine settings imply a complex and highly dynamic environment through the later part of the Holocene.</p>},
  author       = {Farnsworth, Wesley R. and Ingólfsson, Ólafur and Noormets, Riko and Allaart, Lis and Alexanderson, Helena and Henriksen, Mona and Schomacker, Anders},
  issn         = {0300-9483},
  language     = {eng},
  month        = {07},
  number       = {3},
  pages        = {585--603},
  publisher    = {Taylor & Francis},
  series       = {Boreas},
  title        = {Dynamic Holocene glacial history of St. Jonsfjorden, Svalbard},
  url          = {http://dx.doi.org/10.1111/bor.12269},
  volume       = {46},
  year         = {2017},
}