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NEW (BE)-B-10 COSMOGENIC AGES FROM THE VIMMERBY MORAINE CONFIRM THE TIMING OF SCANDINAVIAN ICE SHEET DEGLACIATION IN SOUTHERN SWEDEN

Johnsen, Timothy F.; Alexanderson, Helena LU ; Fabel, Derek and Freeman, Stewart P. H. T. (2009) In Geografiska Annaler. Series A. Physical Geography 91A(2). p.113-120
Abstract
The overall pattern of deglaciation of the southern part of the Scandinavian Ice Sheet has been considered established, although details of the chronology and ice sheet dynamics are less well known. Even less is known for the south Swedish Upland because the area was deglaciated mostly by stagnation. Within this area lies the conspicuous Vimmerby moraine, for which we have used the terrestrial cosmogenic nuclide (Be-10) exposure dating technique to derive the exposure age of six glacially transported boulders. The six Be-10 cosmogenic ages are internally consistent, ranging from 14.9 +/- 1.5 to 12.4 +/- 1.3 ka with a mean of 13.6 +/- 0.9 ka. Adjusting for the effects of surface erosion, snow burial and glacio-isostatic rebound causes the... (More)
The overall pattern of deglaciation of the southern part of the Scandinavian Ice Sheet has been considered established, although details of the chronology and ice sheet dynamics are less well known. Even less is known for the south Swedish Upland because the area was deglaciated mostly by stagnation. Within this area lies the conspicuous Vimmerby moraine, for which we have used the terrestrial cosmogenic nuclide (Be-10) exposure dating technique to derive the exposure age of six glacially transported boulders. The six Be-10 cosmogenic ages are internally consistent, ranging from 14.9 +/- 1.5 to 12.4 +/- 1.3 ka with a mean of 13.6 +/- 0.9 ka. Adjusting for the effects of surface erosion, snow burial and glacio-isostatic rebound causes the mean age to increase only by c. 6% to c. 14.4 +/- 0.9 ka. The Be-10 derived age for the Vimmerby moraine is in agreement with previous estimates forthe timing of deglaciation based on radiocarbon dating and varve chronology. This result shows promise for further terrestrial cosmogenic nuclide exposure studies in southern Sweden. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
terrestrial cosmogenic nuclide (Be-10) exposure dating, deglaciation, Scandinavian Ice Sheet, Vimmerby moraine, Sweden, south Swedish Upland
in
Geografiska Annaler. Series A. Physical Geography
volume
91A
issue
2
pages
113 - 120
publisher
Wiley-Blackwell
external identifiers
  • wos:000266700400005
  • scopus:67049136180
ISSN
0435-3676
DOI
10.1111/j.1468-0459.2009.00358.x
language
English
LU publication?
no
id
08e12bf4-fa5d-4385-a981-b27242a36cbd (old id 4450044)
date added to LUP
2014-05-26 09:27:50
date last changed
2017-12-10 03:48:09
@article{08e12bf4-fa5d-4385-a981-b27242a36cbd,
  abstract     = {The overall pattern of deglaciation of the southern part of the Scandinavian Ice Sheet has been considered established, although details of the chronology and ice sheet dynamics are less well known. Even less is known for the south Swedish Upland because the area was deglaciated mostly by stagnation. Within this area lies the conspicuous Vimmerby moraine, for which we have used the terrestrial cosmogenic nuclide (Be-10) exposure dating technique to derive the exposure age of six glacially transported boulders. The six Be-10 cosmogenic ages are internally consistent, ranging from 14.9 +/- 1.5 to 12.4 +/- 1.3 ka with a mean of 13.6 +/- 0.9 ka. Adjusting for the effects of surface erosion, snow burial and glacio-isostatic rebound causes the mean age to increase only by c. 6% to c. 14.4 +/- 0.9 ka. The Be-10 derived age for the Vimmerby moraine is in agreement with previous estimates forthe timing of deglaciation based on radiocarbon dating and varve chronology. This result shows promise for further terrestrial cosmogenic nuclide exposure studies in southern Sweden.},
  author       = {Johnsen, Timothy F. and Alexanderson, Helena and Fabel, Derek and Freeman, Stewart P. H. T.},
  issn         = {0435-3676},
  keyword      = {terrestrial cosmogenic nuclide (Be-10) exposure dating,deglaciation,Scandinavian Ice Sheet,Vimmerby moraine,Sweden,south Swedish Upland},
  language     = {eng},
  number       = {2},
  pages        = {113--120},
  publisher    = {Wiley-Blackwell},
  series       = {Geografiska Annaler. Series A. Physical Geography},
  title        = {NEW (BE)-B-10 COSMOGENIC AGES FROM THE VIMMERBY MORAINE CONFIRM THE TIMING OF SCANDINAVIAN ICE SHEET DEGLACIATION IN SOUTHERN SWEDEN},
  url          = {http://dx.doi.org/10.1111/j.1468-0459.2009.00358.x},
  volume       = {91A},
  year         = {2009},
}