10.6084/m9.figshare.3453626
Anne Jennings
Anne
Jennings
Thorvaldur Thordarson
Thorvaldur
Thordarson
Kate Zalzal
Kate
Zalzal
Joseph Stoner
Joseph
Stoner
Christopher Hayward
Christopher
Hayward
Áslaug Geirsdóttir
Áslaug
Geirsdóttir
Gifford Miller
Gifford
Miller
Holocene tephra from Iceland and Alaska in SE Greenland Shelf Sediments
Geological Society of London
2016
JM
SE Greenland cores
cryptotephra peaks
tephra plume dispersal
SE Greenland Shelf Sediments
tephra abundance peaks
Holocene marine sediments
SE Greenland shelf
Iceland shelf
EG
10.4 cal kyr BP
MD
3600 BP eruption
SE Greenland shelf cores
10.2 kyr Saksunarvatn tephra
AD
Geology
2016-06-21 11:33:56
Dataset
https://geolsoc.figshare.com/articles/dataset/Holocene_tephra_from_Iceland_and_Alaska_in_SE_Greenland_Shelf_Sediments/3453626
<p>The record of Icelandic volcanic events in Holocene marine sediments off SE Greenland provides evidence for the frequency
and timing of atmospheric tephra plume dispersal from Iceland towards Greenland. Geochemistry of tephra abundance peaks from
two SE Greenland shelf cores: MD99-2322 and JM96-1215-2GC are compared with core MD99-2269, north Iceland shelf, to evaluate
the dispersal direction of Icelandic eruptions. Glass shard counts (106–1000 µm) in MD99-2322 revealed 16 distinct cryptotephra
peaks. Geochemical analyses of eight cryptotephra peaks in MD99-2322 and two in JM96-1215 indicate sources in the volcanic
systems of Iceland and Alaska. A tephra layer matching in geochemistry and stratigraphy to the <em>c.</em> 3600 BP eruption of the Aniakchak Volcano in the Aleutian Islands was identified in JM96-1215/2GC. The Settlement Tephra
(AD 871±2) and Hekla B (H-B) were identified in MD99-2322. A new marker horizon, Katla EG-6.73, was found in both SE Greenland
cores. Three basaltic peaks between 9.9 and 10.4 cal kyr BP, exhibit major-element geochemistry indistinguishable from the
<em>c.</em> 10.2 kyr Saksunarvatn tephra. These layers represent 3 out of≥seven westward and northward-dispersed Grímsvötn layers found
on the SE Greenland shelf and the north Iceland shelf between 9.9 and 10.4 cal kyr BP.
</p>