The Seven Islands, Svalbard: glaciation at the margin

Forskningsoutput: KonferensbidragKonferensabstract

Abstract

On the Seven Islands, north of Nordaustlandet, Svalbard, decreasing snow cover has made previously inaccessible stratigraphic sections in coastal cliffs possible to investigate. Sections on two of the islands, Phippsøya and Parryøya, reveal mainly raised marine deposits, representing one or more coarsening upward sequences (emergence cycles) at each site, which in turn imply preceding regional glaciations (cf. Alexanderson et al. in press). Optically stimulated luminescence (OSL) ages are pending but radiocarbon (14C) ages and correlation to a previously studied site on Phippsøya (Forman and Ingólfsson 2000) suggest at least two events that occurred during the late Weichselian-early Holocene and prior to 40 14C ka BP, respectively. These results, along with observations of postglacial land uplift and of transport of erratic boulders to the islands, provide information on the glacial history and dynamics of an area close to the margin of the Svalbard-Barents Sea ice sheet.

References
Alexanderson, H., Henriksen, M., Ryen. H.T., Landvik, J.Y. and Peterson, G. in press. 200 ka of glacial events in NW Svalbard: An emergence cycle facies model and regional correlations. arktos.
Forman, S.L. and Ingólfsson, Ó, 2000. Late Weichselian glacial history and postglacial emergence of Phippsøya, Sjuøyane, northern Svalbard: a comparison of modelled and empirical estimates of a glacial-rebound hinge line. Boreas 29, 16-25.

Detaljer

Författare
  • Helena Alexanderson
  • Anders Schomacker
  • Wesley R. Farnsworth
  • Riko Noormets
  • Nina Kirchner
  • Olafur Ingolfsson
Enheter & grupper
Externa organisationer
  • Stockholms universitet
  • University Centre in Svalbard
  • UiT The Arctic University of Norway, Tromsø
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Geologi
Originalspråkengelska
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördNej
Evenemang6th PastGateways conference and workshop - Durham, Storbritannien
Varaktighet: 2018 maj 162018 maj 20

Konferens

Konferens6th PastGateways conference and workshop
LandStorbritannien
OrtDurham
Period2018/05/162018/05/20

Related projects

Helena Alexanderson

2007/04/01 → …

Projekt: ForskningInternationellt samarbete, Undervisning

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