dc.contributor.author |
Hall, Kevin John
|
|
dc.contributor.author |
Meiklejohn, K.I. (Ian)
|
|
dc.contributor.author |
Bumby, Adam John
|
|
dc.date.accessioned |
2012-05-28T06:45:50Z |
|
dc.date.available |
2012-05-31T00:20:04Z |
|
dc.date.issued |
2011-05 |
|
dc.description.abstract |
Sub-Antarctic Marion Island was the site of extensive volcanism as well as glaciation during
both the Quaternary and the Holocene. Initial reconstructions suggested a link between deglaciation and the
initiation of faulting which, in turn, facilitated lava eruptions during the interglacials. However, our
reassessment of the faulting, volcanic rock, and palaeoglacier distribution indicate that these original
interpretations were erroneous. Features thought to be due to faulting are shown to be erosional scarps and
this significantly changes interpretations of former glacier distribution. Further, the loss of the former ice
cap has revealed new information on former glaciers and their flow directions, thereby allowing
reconstruction of palaeoglaciers. Our new reconstruction fits with information from invertebrate genetic
mapping that suggest some lava outcrops were nunataks and, therefore, refuges during the Last Glacial
period. The new findings of glacial landforms in areas previously covered by snow suggest there was a
significant ice advance during the Little Ice Age. Although Holocene volcanic rocks overlie and mask much
of the glacial evidence, it has been possible to develop a proposed new reconstruction for glaciation, which
is presented together with some of the implications. |
en |
dc.description.librarian |
nf2012 |
en |
dc.description.sponsorship |
The University of Northern
British Columbia helped KH with some of the travel costs
associated with undertaking this work. Funding for the project was provided by the National
Research Foundation Grants SNA2005061300001 (IM) and
SNA2008050800005 (AB). |
en_US |
dc.description.uri |
http://journals.cambridge.org/action/displayJournal?jid=ans |
en_US |
dc.identifier.citation |
Hall, KJ, Meiklejohn, KI & Bumby, A 2011, 'Marion Island volcanism and glaciation', Antarctic Science, vol. 23, no. 3, pp. 155-163. |
en |
dc.identifier.issn |
0954-1020 (print) |
|
dc.identifier.issn |
1365-2079 (online) |
|
dc.identifier.other |
10.1017/S0954102010000878 |
|
dc.identifier.uri |
http://hdl.handle.net/2263/18935 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Cambridge University Press |
en_US |
dc.rights |
© Antarctic Science Ltd 2010 |
en_US |
dc.subject |
Glacier reconstruction |
en |
dc.subject |
Glacier-volcanic interactions |
en |
dc.subject |
Peri-Antarctic islands |
en |
dc.subject.lcsh |
Faults (Geology) -- Prince Edward Islands -- Marion Island |
en |
dc.subject.lcsh |
Glaciology -- Prince Edward Islands -- Marion Island |
en |
dc.subject.lcsh |
Paleoclimatology -- Prince Edward Islands -- Marion Island |
en |
dc.subject.lcsh |
Volcanism -- Prince Edward Islands -- Marion Island |
en |
dc.title |
Marion Island volcanism and glaciation |
en |
dc.type |
Article |
en |