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Major earthquake at...
Major earthquake at the Pleistocene-Holocene transition in Lake Vattern, southern Sweden
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- Jakobsson, Martin (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Björck, Svante (author)
- Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science
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- O'Regan, Matt (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Flodén, Tom (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Greenwood, Sarah L. (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Swärd, Henrik (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Lif, Arne (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Ampel, Linda (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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- Koyi, Hemin (author)
- Uppsala universitet,Berggrundsgeologi
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- Skelton, Alasdair (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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(creator_code:org_t)
- 2014
- 2014
- English.
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In: Geology. - 0091-7613 .- 1943-2682. ; 42:5, s. 379-382
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https://doi.org/10.1...
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Abstract
Subject headings
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- Lake Vattern, Sweden, is within a graben that formed through rifting along the boundary between two Precambrian terrains. Geophysical mapping and geological coring show that substantial tectonic movements along the Lake Vattern graben occurred at the very onset of the Holocene. This is evident from deformation structures in the soft sediment accumulated on the lake floor. Our interpretation of these structures suggests as much as 13 m of vertical tectonic displacements along sections of a >80-km-long fault system. If these large displacements are from one tectonic event, Lake Vattern must have had an earthquake with seismic moment magnitudes to 7.5. In addition, our geophysical mapping shows large landslides along sections of the steep lake shores. Pollen analysis of sediment infillings of some of the most prominent sediment deformation structures places this major seismic event at the Younger Dryas-Preboreal transition, ca. 11.5 ka. We suggest that this event is mainly related to the rapid release of ice-sheet load following the deglaciation. This paleoseismic event in Lake Vattern ranks among the larger known intraplate tectonic events in Scandinavia and attests to the significance of glacio-isostatic unloading.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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Geology
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To the university's database
- By the author/editor
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Jakobsson, Marti ...
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Björck, Svante
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O'Regan, Matt
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Flodén, Tom
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Greenwood, Sarah ...
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Swärd, Henrik
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show more...
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Lif, Arne
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Ampel, Linda
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Koyi, Hemin
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Skelton, Alasdai ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geology
- Articles in the publication
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Geology
- By the university
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Stockholm University
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Uppsala University
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Lund University