Chronology and paleoenvironments during the late Weichselian deglaciation of the southwest Iceland shelf Journal Article uri icon

Overview

abstract

  • Foraminifera, sedimentology, and tephra geochemistry in core 93030‐006 LCF from the southwestern Iceland shelf were used to reconstruct paleoenvironments between 12.7 and 9.4 14C ka BP. Seismic‐reflection profiles place the core in glacial‐marine and marine sediments within one meter of the underlying glacial till. Foraminifers in the earliest glacial‐marine sediments provide a record of ice‐distal conditions and immigration of slope species onto the shelf in association with warm Atlantic water. Meltwater increased during the Allerød under a weakened Atlantic water influence. Arctic conditions began by 11.14 14C ka BP with an abrupt increase in meltwater and near exclusion of boreal fauna from the shelf. Meltwater diminished in the early Younger Dryas, coinciding with sea‐surface cooling between 11.14 and 10.5 14C ka BP. A slight warming recorded in the uppermost glacial‐marine sediments was interrupted by an inferred jökulhlaup event emanating from glacier ice on the Western Volcanic Zone. Retreat of the ice margin from the sea sometime between c. 10.3 and 9.94 14C ka BP coincided with this event. The onset of postglacial marine sedimentation occurred along with increasing evidence of Atlantic water c. 9.94 14C ka BP and was interrupted by a short‐lived Pre‐boreal cooling of the Irminger Current c. 9.91 14C ka BP. Conditions similar to those today were established by 9.7 14C ka BP.

publication date

  • September 1, 2000

has restriction

  • closed

Date in CU Experts

  • March 24, 2014 5:23 AM

Full Author List

  • JENNINGS A; SYVITSKI J; GERSON L; GRÖNVOLD K; GEIRSDÓTTIR Á; HARDARDÓTTIR J; ANDREWS J; HAGEN S

author count

  • 8

Other Profiles

International Standard Serial Number (ISSN)

  • 0300-9483

Electronic International Standard Serial Number (EISSN)

  • 1502-3885

Additional Document Info

start page

  • 163

end page

  • 183

volume

  • 29

issue

  • 3