Lateglacial to Holocene relative sea-level changes in the Stykkishólmur area, northern Snæfellsnes, Iceland.

Martin Brader, Jerry M. Lloyd, Mike Bentley, Anthony Newton

Research output: Contribution to journalArticlepeer-review

Abstract

Comparatively little research has been undertaken on relative sea-level (RSL) change in western Iceland. This paper presents the results of diatom, tephrochronological and radiocarbon analyses on six isolation basins and two coastal lowland sediment cores from the Stykkishólmur area, northern Snæfellsnes, western Iceland. The analyses provide a reconstruction of Lateglacial to mid-Holocene RSL changes in the region. The marine limit is measured to 65–69 m above sea level (asl), with formation being estimated at 13.5 cal ka BP. RSL fall initially occurred rapidly following marine limit formation, until ca. 12.6 cal ka BP, when the rate of RSL fall decreased. RSL fell below present in the Stykkishólmur area during the early Holocene (by ca. 10 cal ka BP). The rates of RSL change noted in the Stykkishólmur area demonstrate lesser ice thicknesses in Snæfellsnes than Vestfirðir during the Younger Dryas, when viewed in the regional context. Consequently, the data provide an insight into patterns of glacio-isostatic adjustment surrounding Breiðafjörður, a hypothesized major ice stream at the Last Glacial Maximum.
Original languageEnglish
Pages (from-to)497-507
JournalJournal of Quaternary Science
Volume30
Issue number5
Early online date14 Jul 2015
DOIs
Publication statusPublished - 16 Jul 2015

Keywords

  • diatom
  • Iceland
  • isolation basin
  • reconstruction
  • sea level

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