A little goes a long way: discovery of a new mid‐Holocene tephra in Sweden

Boygle, Jane

doi:10.1111/j.1502-3885.1998.tb00878.x

Cited by 41 publications

(24 citation statements)

References 22 publications

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“…3). It was not possible to analyse the tephra horizon at 74-75 cm, but it is likely that it represents the Hekla-3 eruption which has been geochemically confirmed in both peat and lake sediments from Värmland (Boygle 1998;Zillén et al 2002;Wastegård in prep.). This tephra is one of the most widespread Holocene isochrones in Scandinavia and northern Germany (e.g.…”

Section: The Bog Datamentioning

confidence: 99%

Holocene humidity fluctuations in Sweden inferred from dendrochronology and peat stratigraphy

Gunnarson

Borgmark

Wastegård

2003

Boreas

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Tree‐ring and peat stratigraphy data were examined back to 5000 BC in order to identify and compare humidity changes in Fennoscandia. The temporal variation in distribution of Scots pine (Pinus sylvestris L.) was used as a measure of past lake‐level fluctuations in central Sweden. The chronology, which spans 2893 BC–AD 1998 with minor gaps in AD 887–907 and 1633–1650 BC and with additional floating chronologies back to 4868 BC, was cross‐dated and fixed to an absolute timescale using a chronology from Torneträsk, northern Sweden. The peat stratigraphy from the Stömyren peat bog, south‐central Sweden, was transformed into humification indices to evaluate humidity changes during the past 8000 years. The peat chronology is established by four tephra datings and eight 14C datings. Synchronous periods of drier conditions, interpreted from regeneration and the mortality pattern of pine, tree‐ring chronology and peat humification, were recognized at c. 4900–4800 BC, 2400–2200 BC, 2100–1800 BC, 1500–1100 BC, AD 50–200, AD 400–600 and AD 1350–1500. Possible wetter periods were encountered at 3600–3400 BC, 3200–2900 BC, 2200–2100 BC, 1700–1500 BC, 1100–900 BC, 100 BC‐AD 50, AD 200–400, AD 750–900 and AD 1550–1700. The wet and dry periods revealed by the tree rings and peat stratigraphy data indicate considerable humidity changes in the Holocene.

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Section: The Bog Datamentioning

confidence: 99%

Holocene humidity fluctuations in Sweden inferred from dendrochronology and peat stratigraphy

Gunnarson

Borgmark

Wastegård

2003

Boreas

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“…van den Bogaard & Schmincke 2002), in Sweden (Oldfield et al 1997;Boygle 1998;Wastegård et al 2003;Bergman et al 2004), in Norway (Persson 1971;Holmes 1998), and in the Faroe Islands (Persson 1971;Wastegård et al 2001). In Ireland, the rapidly accumulating, Sphagnumrich, lowland raised bogs have provided ideal material for high precision radiocarbon-dating of a number of the Holocene tephra layers that are of value as chronological markers (Pilcher et al 1995;Plunkett et al 2004).…”

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confidence: 99%

A Holocene tephra record from the Lofoten Islands, Arctic Norway

Pilcher¹,

Bradley

Francus

et al. 2008

Boreas

116

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Pilcher, J., Bradley, R. S., Francus, P. & Anderson, L. 2005 (May): A Holocene tephra record from the Lofoten Islands, Arctic Norway. Boreas, Vol. 34, pp. 136–156. Oslo. ISSN 0300–9483. A tephrochronology has been established for a peat bog in the Lofoten Islands that provides a dating framework for future lake and bog studies of climate variation in this climatically sensitive area. Twenty‐three tephra layers were identified, all apparently of Icelandic origin. These included the historically dated tephras of AD 1875 (Askja), AD 1362 (Öraefajökull), AD 1158 (Hekla), AD 1104 (Hekla) and the Landnam tephra identified at AD 875 in the GRIP ice core. Other layers, previously radiocarbon dated in Ireland and elsewhere, include the Hekla eruptions of c. 2310 BC and c. 5990 BC. The basal clays below the peat contain tephra of both the Askja eruption of c. 9500 BC (10 000 radiocarbon years BP) and the well‐known Vedde Ash of c. 12 000 BP (10 030 80 BC in GRIP ice core).

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“…Sparse traces of tephra can travel long distances from comparatively small-scale eruptions (e.g. Dugmore et al, 1996;Boygle, 1998), and conversely, just because an eruption is well-known this does not mean a distant trace of it exists. Recent research has highlighted comprehensive records of Icelandic volcanic activity in places such as Germany (van den Bogaard and Schmincke, 2002); but not all downwind distal sites necessarily contain such records; traces of major Icelandic eruptions can prove to be elusive in other distal areas (e.g.…”

Section: Discussion: Databases and The Development Of Research Agendasmentioning

confidence: 99%

Tephrabase: tephrochronology and the development of a centralised European database

Newton

Dugmore

Gittings

2007

J Quaternary Science

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2007. Tephrabase: tephrochronology and the development of a centralised European database.ABSTRACT: Tephrabase was launched on the World Wide Web in 1995 as a tool for tephrochronological research. In order to facilitate the identification, correlation and dating of tephra deposits, this database may be interrogated through multiple routes, including by source volcano, date, location, and tephra chemistry; datasets include stratigraphy, geochemistry, chronology and spatial information. Currently all the European data refer to Late Quaternary Icelandic-sourced tephras, post-12 k yr BP. The sites (62) where the tephra deposits are found include Iceland, the United Kingdom, Ireland, the Faroe Islands, Sweden and Russia. In addition, there are also data on tephra layers in central Mexico. Use of Tephrabase highlights the importance of selected geochemical data, but this has to be used with care as major element characteristics alone do not always produce unique definitions for single tephra deposits. For the most accurate results multiple criteria must be used. Tephrabase can be found at http://www.tephrabase.org.

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A little goes a long way: discovery of a new mid‐Holocene tephra in Sweden

Cited by 41 publications

References 22 publications

Holocene humidity fluctuations in Sweden inferred from dendrochronology and peat stratigraphy

Holocene humidity fluctuations in Sweden inferred from dendrochronology and peat stratigraphy

A Holocene tephra record from the Lofoten Islands, Arctic Norway

Tephrabase: tephrochronology and the development of a centralised European database

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