3 Katla: Tephrochronology and Eruption History

Rannsóknarafurð: Kafli í bók/skýrslu/ráðstefnuritiKafliritrýni

23 Tilvitnanir (Scopus)

Útdráttur

The Holocene eruption history of the Katla volcanic system and the ensuing environmental changes are revealed in two archives: in written documents and in its volcanic products. Hydromagmatic explosive basaltic eruptions on fissures below Mýrdalsjökull are the dominant mode of activity, explosive silicic eruptions occur sporadically and effusive eruptions are least common. Most of the eruption history is recorded in tephra layers, which also provide a dating tool for the effusive volcanism and the environmental changes. The largest event is the AD ∼934 Eldgjá flood basalt eruption, which also caused extensive environmental changes. Volcanogenic jökulhlaups have escaped to the west, south and east with up to 300,000 m3/s peak meltwater discharge. Holocene eruption frequency has varied, with distinct peaks 2,000-4,000 and 7,000-8,000 years ago, and the lowest activity on record during last millennium. The magma system below Katla seems to evolve through three stages, repeated twice in 8,500 years.

Upprunalegt tungumálEnska
Titill gistiútgáfuThe Myrdalsjokull Ice Cap, Iceland. Glacial processes, sediments and landforms on an active volcano
ÚtgefandiElsevier Ltd.
Síður23-49
Síðufjöldi27
ISBN-númer (prentað)9780444530455
DOI
ÚtgáfustaðaÚtgefið - 2010

Ritröð

NafnDevelopments in Quaternary Science
Bindi13
ISSN-númer (prentað)1571-0866

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