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Towards a Holocene tephrochronology for the Faroe Islands, North Atlantic
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi.
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Antal upphovsmän: 82018 (Engelska)Ingår i: Quaternary Science Reviews, ISSN 0277-3791, E-ISSN 1873-457X, Vol. 195, s. 195-214Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The Faroe Islands hold a key position in the North Atlantic region for tephra studies due to their relative proximity to Iceland. Several tephras have been described over the last 50 years in peat and lake sediment sequences, including the type sites for the Saksunarvatn and Mjauvotn tephras. Here we present a comprehensive overview of Holocene tephras found on the Faroe Island. In total 23 tephra layers are described including visible macrotephras such as the Saksunarvatn and Hekla 4 tephras and several cryptotephras. The importance of tephras originally described from the Faroe Islands is highlighted and previously unpublished results are included. In addition, full datasets for several sites are published here for the first time. The Saksunarvatn Ash, now considered to be the result of several eruptions rather than one major eruption, can be separated into two phases on the Faroe Islands; one early phase with two precursor eruptions with lower MgO concentrations (4.5-5.0 wt%) than the main eruption and a later phase with higher MgO concentrations (5.5-6.0 wt%), including the visible Saksunarvatn Ash. The Tjornuvik Tephra, previously considered to be a primary deposit, is now interpreted as a reworked tephra with material from at least two middle Holocene eruptions of Hekla. Several of the tephras identified on the Faroe Islands provide useful isochrons for climate events during the Holocene.

Ort, förlag, år, upplaga, sidor
2018. Vol. 195, s. 195-214
Nyckelord [en]
Quaternary, Paleoclimatology, North Atlantic, Holocene, Faroe Islands
Nationell ämneskategori
Geovetenskap och miljövetenskap
Identifikatorer
URN: urn:nbn:se:su:diva-160247DOI: 10.1016/j.quascirev.2018.07.024ISI: 000442332700012OAI: oai:DiVA.org:su-160247DiVA, id: diva2:1249668
Tillgänglig från: 2018-09-20 Skapad: 2018-09-20 Senast uppdaterad: 2018-09-20Bibliografiskt granskad

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Av författaren/redaktören
Wastegård, StefanLind, Ewa M.
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Institutionen för naturgeografi
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Quaternary Science Reviews
Geovetenskap och miljövetenskap

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