Sökning: "Cryptotephra"

Hittade 2 uppsatser innehållade ordet Cryptotephra.

1. 1. Assessing the late Holocene14C reservoir age of theChukchi Sea with the AniakchakCFE II tephra 3.6 kyr BP

   Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

   Författare :Alexis Geels; [2019]
   Nyckelord :Cryptotephra; Aniakchak CFE II; Arctic Ocean; Chukchi Sea; Marine Reservoir Effect;

   Sammanfattning : Tephrochronology is a powerful tool to correlate and improve the chronology of sedimentaryarchives in the Arctic Ocean. The Aniakchak Caldera Forming Eruption (CFE) in Alaska at3.6 cal kyr BP ejected ash that were found in a widespread layer in Alaska, and as cryptotephrain the Chukchi Sea, Newfoundland, and Greenland. LÄS MER

3. 2. Tephrochronology of the Last Glacial/Interglacial transition in western Småland, southwestern Sweden

   Kandidat-uppsats, Institutionen för naturgeografi och kvartärgeologi (INK)

   Författare :Björn Morén; [2009]
   Nyckelord :Tephra; Tephrochronology; western Småland; Vedde Ash; Hässeldalen Tephra; Last Glacial Interglacial transition;

   Sammanfattning : Tephrochronology, or the dating and correlation of stratigraphic sediment sequences by the use of tephra, is a dating method that has been much refined in the last decade. This refinement has enabled the detection of cryptotephra, which has expanded the known distribution of different tephras. LÄS MER