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Disrupted vegetation as a response to Jurassic volcanism in southern Sweden

Vivi Vajda, Hans Linderson and Stephen McLoughlin
Disrupted vegetation as a response to Jurassic volcanism in southern Sweden (in Mesozoic biotas of Scandinavia and its Arctic territories, Benjamin P. Kear (editor), Johan Lindgren (editor), Jorn H. Hurum (editor), Jesper Milan (editor) and Vivi Vajda (editor))
Special Publication - Geological Society of London (2016) 434: 127-147


Central Skane (Scania) in southern Sweden hosts evidence of extensive Jurassic volcanism in the form of mafic volcanic plugs and associated volcaniclastic deposits that entomb well-preserved macro-plant and spore-pollen assemblages. Palynological assemblages recovered from the Hoor Sandstone are of Hettangian-Pliensbachian age and those from the overlying lahar deposits are dated as Pliensbachian-early Toarcian (?). Palynomorph assemblages from these units reveal significantly different ecosystems, particularly with respect to the gymnospermous components that represented the main canopy plants. Both palynofloras are dominated by osmundacean, marattiacean and cyatheacean fern spore taxa but, whereas the Hoor Sandstone hosts abundant Chasmatosporites spp. pollen produced by plants related to cycadophytes, the volcanogenic deposits are dominated by cypress family pollen (Perinopollenites) with an understorey component rich in putative Erdtmanithecales (or possibly Gnetales), and collectively representing vegetation of disturbed habitats. Permineralized conifer wood attributed to Protophyllocladoxylon sp., belonging to plants that probably produced the abundant Perinopollenites grains, is abundant in the volcanigenic strata, and shows sporadic intraseasonal and multi-year episodes of growth disruption. Together with the relatively narrow but marked annual growth rings, and the annual and mean sensitivity values that span the complacent-sensitive domains, these features suggest growth within Mediterranean-type biomes subject to episodic disturbance.

ISSN: 0305-8719
EISSN: 2041-4927
Serial Title: Special Publication - Geological Society of London
Serial Volume: 434
Title: Disrupted vegetation as a response to Jurassic volcanism in southern Sweden
Title: Mesozoic biotas of Scandinavia and its Arctic territories
Author(s): Vajda, ViviLinderson, HansMcLoughlin, Stephen
Author(s): Kear, Benjamin P.editor
Author(s): Lindgren, Johaneditor
Author(s): Hurum, Jorn H.editor
Author(s): Milan, Jespereditor
Author(s): Vajda, Vivieditor
Affiliation: Swedish Museum of Natural History, Department of Palaeobiology, Stockholm, Sweden
Affiliation: Uppsala University, Uppsala, Sweden
Pages: 127-147
Published: 2016
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 107
Accession Number: 2016-087121
Categories: PaleobotanyStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch maps
N55°55'60" - N55°55'60", E13°31'60" - E13°31'60"
Secondary Affiliation: Lund University, SWE, Sweden
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201643
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