Distal ash fall from the mid-Holocene eruption of Mount Hudson (H2) discovered in the Falkland Islands: New possibilities for Southern Hemisphere archive synchronisation

Panaretos, P; Albert, PG; Thomas, ZA; Turney, CSM; Stern, CR; Jones, G; Williams, AN; Smith, VC; Hogg, AG; Manning, CJ

Distal ash fall from the mid-Holocene eruption of Mount Hudson (H2) discovered in the Falkland Islands: New possibilities for Southern Hemisphere archive synchronisation

Panaretos, P Albert, PG Thomas, ZA Turney, CSM Stern, CR Jones, G Williams, AN Smith, VC Hogg, AG Manning, CJ

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Quaternary Science Reviews, 2021, 266, pp. 107074-107074
Issue Date:: 2021-08-15

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Field	Value	Language
dc.contributor.author	Panaretos, P
dc.contributor.author	Albert, PG
dc.contributor.author	Thomas, ZA
dc.contributor.author	Turney, CSM
dc.contributor.author	Stern, CR
dc.contributor.author	Jones, G
dc.contributor.author	Williams, AN
dc.contributor.author	Smith, VC
dc.contributor.author	Hogg, AG
dc.contributor.author	Manning, CJ
dc.date.accessioned	2021-12-24T00:04:42Z
dc.date.available	2021-12-24T00:04:42Z
dc.date.issued	2021-08-15
dc.identifier.citation	Quaternary Science Reviews, 2021, 266, pp. 107074-107074
dc.identifier.issn	0277-3791
dc.identifier.uri	http://hdl.handle.net/10453/152509
dc.description.abstract	Cryptotephra deposits (microscopic volcanic ash) are important geochronological tools that can be used to synchronize records of past environmental change. Here we report a distal cryptotephra from a Holocene peat sequence (Canopus Hill) in the Falkland Islands, in the South Atlantic. Using geochemical analysis (major- and trace-element) of individual volcanic glass shards, we provide a robust correlation between this cryptotephra and the large mid-Holocene explosive eruption of Mt. Hudson in Patagonia, Chile (H2; ∼3.9 ka cal BP). The occurrence of H2 as a cryptotephra in the Falkland Islands significantly increases the known distribution of this marker horizon to more than 1200 km from the volcano, a threefold increase of its previous known extent. A high-resolution radiocarbon chronology, based on terrestrial plant macrofossils, dates the H2 tephra to 4265 ± 65 cal yr BP, suggesting that the eruption may have occurred slightly earlier than previously reported. The refined age and new geochemical reference dataset will facilitate the identification of the H2 tephra in other distal locations. The high concentration of glass shards in our peat sequence indicates that the H2 tephra may extend well beyond the Falkland Islands and we recommend future studies search for its presence across the sub-Antarctic islands and Antarctic Peninsula as a potentially useful chronological marker.
dc.language	en
dc.publisher	Elsevier BV
dc.relation	http://purl.org/au-research/grants/arc/DP130104156
dc.relation.ispartof	Quaternary Science Reviews
dc.relation.isbasedon	10.1016/j.quascirev.2021.107074
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	04 Earth Sciences, 21 History and Archaeology
dc.subject.classification	Paleontology
dc.title	Distal ash fall from the mid-Holocene eruption of Mount Hudson (H2) discovered in the Falkland Islands: New possibilities for Southern Hemisphere archive synchronisation
dc.type	Journal Article
utslib.citation.volume	266
utslib.for	04 Earth Sciences
utslib.for	21 History and Archaeology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
utslib.copyright.status	closed_access	*
dc.date.updated	2021-12-24T00:04:40Z
pubs.publication-status	Published
pubs.volume	266

Abstract:

Cryptotephra deposits (microscopic volcanic ash) are important geochronological tools that can be used to synchronize records of past environmental change. Here we report a distal cryptotephra from a Holocene peat sequence (Canopus Hill) in the Falkland Islands, in the South Atlantic. Using geochemical analysis (major- and trace-element) of individual volcanic glass shards, we provide a robust correlation between this cryptotephra and the large mid-Holocene explosive eruption of Mt. Hudson in Patagonia, Chile (H2; ∼3.9 ka cal BP). The occurrence of H2 as a cryptotephra in the Falkland Islands significantly increases the known distribution of this marker horizon to more than 1200 km from the volcano, a threefold increase of its previous known extent. A high-resolution radiocarbon chronology, based on terrestrial plant macrofossils, dates the H2 tephra to 4265 ± 65 cal yr BP, suggesting that the eruption may have occurred slightly earlier than previously reported. The refined age and new geochemical reference dataset will facilitate the identification of the H2 tephra in other distal locations. The high concentration of glass shards in our peat sequence indicates that the H2 tephra may extend well beyond the Falkland Islands and we recommend future studies search for its presence across the sub-Antarctic islands and Antarctic Peninsula as a potentially useful chronological marker.

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http://hdl.handle.net/10453/152509