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A mid to late Holocene cryptotephra framework from eastern North America

A mid to late Holocene cryptotephra framework from eastern North America
A mid to late Holocene cryptotephra framework from eastern North America
Holocene cryptotephras of Alaskan and Pacific Northwestern origin have recently been detected ca. 7,000 km away on the east coast of North America. This study extends the emerging North American tephrochronological framework by geochemically characterising seventeen cryptotephra layers from four newly explored peatlands. All detected tephras were deposited during the late Holocene, with no horizons present in the peat between ca. 3000 - 5000 years ago. The prevalence of the Alaskan White River Ash eastern lobe (AD 847 ± 1) is confirmed across the eastern seaboard from Newfoundland to Maine and a regional depositional pattern from Mount St Helens Set W (AD 1479-1482) is presented. The first occurrences of four additional cryptotephras in eastern North America are described, three of which may originate from source regions in Mexico, Kamchatka (Russia) and Hokkaido (Japan). The possibility of such tephras reaching eastern North America presents the opportunity to link palaeo-archives from the tropics and eastern Asia with those from the western Atlantic seaboard, aiding inter-regional comparisons of proxy-climatic records.
tephra, cryptotephra, volcanic ash, peatlands, late holocene, north america
0277-3791
101-113
Mackay, Helen
483b07c4-6dbb-49f9-abe5-b68aaa99e1f6
Hughes, Paul D.M.
14f83168-b203-4a91-a850-8c48535dc31b
Jensen, Britta J.L.
49e0fb6f-0858-4aa5-954d-b6bfbf236092
Langdon, Pete G.
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Pyne-O’Donnell, Sean D.F.
fbc701e7-372d-44b7-ae74-1f34f1020804
Plunkett, Gill
2e5c454d-720d-4232-9750-f20c72db3be6
Froese, Duane G.
98896463-a7fe-462a-badb-9e9732b49503
Coulter, Sarah
55165a75-0d30-4512-b6d3-d17d02cef314
Gardner, James E.
a219d0b0-2e40-4dda-9c52-9279a6a6c5d4
Mackay, Helen
483b07c4-6dbb-49f9-abe5-b68aaa99e1f6
Hughes, Paul D.M.
14f83168-b203-4a91-a850-8c48535dc31b
Jensen, Britta J.L.
49e0fb6f-0858-4aa5-954d-b6bfbf236092
Langdon, Pete G.
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Pyne-O’Donnell, Sean D.F.
fbc701e7-372d-44b7-ae74-1f34f1020804
Plunkett, Gill
2e5c454d-720d-4232-9750-f20c72db3be6
Froese, Duane G.
98896463-a7fe-462a-badb-9e9732b49503
Coulter, Sarah
55165a75-0d30-4512-b6d3-d17d02cef314
Gardner, James E.
a219d0b0-2e40-4dda-9c52-9279a6a6c5d4

Mackay, Helen, Hughes, Paul D.M., Jensen, Britta J.L., Langdon, Pete G., Pyne-O’Donnell, Sean D.F., Plunkett, Gill, Froese, Duane G., Coulter, Sarah and Gardner, James E. (2016) A mid to late Holocene cryptotephra framework from eastern North America. Quaternary Science Reviews, 132, 101-113. (doi:10.1016/j.quascirev.2015.11.011).

Record type: Article

Abstract

Holocene cryptotephras of Alaskan and Pacific Northwestern origin have recently been detected ca. 7,000 km away on the east coast of North America. This study extends the emerging North American tephrochronological framework by geochemically characterising seventeen cryptotephra layers from four newly explored peatlands. All detected tephras were deposited during the late Holocene, with no horizons present in the peat between ca. 3000 - 5000 years ago. The prevalence of the Alaskan White River Ash eastern lobe (AD 847 ± 1) is confirmed across the eastern seaboard from Newfoundland to Maine and a regional depositional pattern from Mount St Helens Set W (AD 1479-1482) is presented. The first occurrences of four additional cryptotephras in eastern North America are described, three of which may originate from source regions in Mexico, Kamchatka (Russia) and Hokkaido (Japan). The possibility of such tephras reaching eastern North America presents the opportunity to link palaeo-archives from the tropics and eastern Asia with those from the western Atlantic seaboard, aiding inter-regional comparisons of proxy-climatic records.

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More information

Accepted/In Press date: 14 November 2015
e-pub ahead of print date: 10 December 2015
Published date: 15 January 2016
Keywords: tephra, cryptotephra, volcanic ash, peatlands, late holocene, north america
Organisations: Geography & Environment

Identifiers

Local EPrints ID: 384403
URI: https://eprints.soton.ac.uk/id/eprint/384403
ISSN: 0277-3791
PURE UUID: 29c6e993-52ff-4cbc-9666-bb7c7f692331
ORCID for Pete G. Langdon: ORCID iD orcid.org/0000-0003-2724-2643

Catalogue record

Date deposited: 25 Nov 2015 14:15
Last modified: 10 Dec 2019 01:52

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