Försök till tefrokronologisk datering i fyra färöiska Myrar

Persson, Christer

doi:10.1080/11035896809451887

Cited by 21 publications

(32 citation statements)

References 2 publications

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“…Previous palaeoecological and tephrochronological investigations have been carried out on both lacustrine and peat sediments from the islands (Persson, 1968; 102 The Holocene 11 (2001) 1999). In warmer periods, when generally strong, or northwarddisplaced, circulation occurs in the atmosphere and ocean, the Faroe Islands lie continually in the main arm of the North Atlantic Drift.…”

Section: Introductionmentioning

confidence: 99%

The Mjáuvøtn tephra and other Holocene tephra horizons from the Faroe Islands: a link between the Icelandic source region, the Nordic Seas, and the European continent

et al. 2001

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Six different tephra horizons were found in peat and lacustrine sediments on the Faroe Islands in the North Atlantic. Their geochemistry showed that they were of Icelandic origin. Three of these can be correlated with previously described tephra horizons from the Faroe Islands: the Saksunarvatn tephra (c. 9000 BP), the Hekla-4 (c. 3800 BP) and Hekla-Selsund (c. 3600 BP). A previously unrecorded basaltic tephra dated to c. 5700-5300 BP was found in two lacustrine successions. This horizon is named the Mjauv0tn tephra after Mjauv0tn Lake on the island of Streymoy. Two further tephras were recorded: the basaltic phase of the 'Landnmi' tephra (VITa, c. AD 870s), and the rhyolitic Tj0rnuvik tephra. These were found in sediments deposited shortly after the first phase of human settlement at Tj0rnuvik, which is AMS dated to AD 675-861 (calibrated age). The Faroe Islands are an important link between the volcanic sources on Iceland, and the established tephrochronological frameworks on the British Isles, Scandinavia and Gerrnany. Their position within a sensitive region of the northeastern branch of the North Atlantic Drift make the Faroe Islands ideal for registering climate changes during the Holocene. The establishment of a modern tephrochronology may provide a tool for more precisely dating and correlating regional climate events in and around the Nordic Seas.

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Section: Introductionmentioning

confidence: 99%

The Mjáuvøtn tephra and other Holocene tephra horizons from the Faroe Islands: a link between the Icelandic source region, the Nordic Seas, and the European continent

et al. 2001

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“…Distal tephra studies are built on the pioneering work of Christer Persson, who found several layers of volcanic glass in peat deposits in the Faeroe Islands, Norway and Sweden (Persson, 1966(Persson, , 1967(Persson, , 1968(Persson, , 1971. These layers were identified and correlated to Icelandic sources by measuring refractive indices of the glass and radiocarbon dating the peat.…”

Section: Introductionmentioning

confidence: 99%

Towards a Holocene tephrochronology for Sweden: geochemistry and correlation with the North Atlantic tephra stratigraphy

Boygle

2004

J Quaternary Science

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Northern Europe has been affected by fallout of tephra from volcanic eruptions in Iceland throughout at least the Late-glacial and Holocene. Microscopic volcanic ash horizons found in the British Isles, northern Germany and Scandinavia (e.g. Hekla 4) now provide important regional isochrons. Over recent years analytical techniques such as electron probe microanalysis (EPMA) have helped identify these distal tephra layers by glass geochemistry. Early tephra work in Sweden used refractive indices and bracketing radiocarbon dates for identification, resulting in tentative correlation. This paper presents geochemical data for Icelandic Holocene tephra in Sweden. Several sites in central Sweden have four distinct mid-Holocene tephra layers. Correlation with the Icelandic record indicates that the following tephra layers are present: Hekla 4 (ca. 3830 yr BP), Kebister tephra (ca. 3600 yr BP), Hekla 3 (ca. 2880 yr BP) and Askja AD 1875. Preliminary analyses suggest that more, previously unidentified, tephra layers are present in low concentrations in the region, indicating potential for expanding the Swedish tephrochronology for palaeoecological and palaeoenvironmental work in northern Europe.

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“…The magnitude of these eruptions is small compared with the large Holocene eruptions of the Hekla andÖraefajökull volcanoes, and the SILK tephra layers have not so far been detected outside Iceland. The Holocene tephrochronology of the Faroe Islands has been outlined by Persson (1968), Dugmore and Newton (1998) and Wastegård et al (2001).…”

Section: Introductionmentioning

confidence: 99%

Early to middle Holocene silicic tephra horizons from the Katla volcanic system, Iceland: new results from the Faroe Islands

Wastegård

2002

J Quaternary Science

105

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Wastegård, S. 2002. Early to middle Holocene silicic tephra horizons from the Katla volcanic system, Iceland: new results from the Faroe Islands.ABSTRACT: Comparatively few Icelandic tephra horizons dated to the early part of the Holocene have so far been detected outside Iceland. Here, I present several tephra horizons that have been recorded in a Holocene peat sequence on the Faroe Islands. Geochemical analyses show that at least two dacitic and one rhyolitic tephra layers were erupted from the Katla volcanic system on southern Iceland between ca. 8000 and 5900 cal. yr BP. The upper two layers can be correlated with the SILK tephras described from southern Iceland, whereas the third, dated to ca. 8000 cal. yr BP, has a geochemistry virtually identical to the rhyolitic component of the Vedde Ash. The results suggest that the Late Weichselian and early Holocene eruption history of the Katla volcano was probably more complex than inferred from Iceland. A new, early Holocene rhyolitic tephra dated to ca. 10 500 cal. yr BP probably originates in the Snaefellsnes volcanic centre in western Iceland. These new findings may play an important role in developing a Holocene tephra framework for northwest Europe.

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Försök till tefrokronologisk datering i fyra färöiska Myrar

Cited by 21 publications

References 2 publications

The Mjáuvøtn tephra and other Holocene tephra horizons from the Faroe Islands: a link between the Icelandic source region, the Nordic Seas, and the European continent

The Mjáuvøtn tephra and other Holocene tephra horizons from the Faroe Islands: a link between the Icelandic source region, the Nordic Seas, and the European continent

Towards a Holocene tephrochronology for Sweden: geochemistry and correlation with the North Atlantic tephra stratigraphy

Early to middle Holocene silicic tephra horizons from the Katla volcanic system, Iceland: new results from the Faroe Islands

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