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Late Ordovician (Katian) spores in Sweden : oldest land plant remains from Baltica

Author:
  • Ahmed Salah Badawy
  • Kristina Mehlqvist
  • Vivi Vajda
  • Per Ahlberg
  • Mikael Calner
Publishing year: 2014
Language: English
Pages: 16-21
Publication/Series: GFF
Volume: 136
Issue: 1
Document type: Journal article
Publisher: Taylor & Francis

Abstract english

A palynologial study of the Ordovician-Silurian boundary (Katian–Rhuddanian) succession in the Röstånga-1 drillcore, southern Sweden, has been performed. The lithology is dominated by mudstone and graptolitic shale, with subordinate limestone, formed in the deeper marine halo of southern Baltica. The palynological assemblages are dominated by marine microfossils, mainly chitinozoans and acritarchs. Sparse but well preserved cryptospores, including Tetrahedraletes medinensis, T. grayii and Pseudodyadospora sp., were encountered in the Lindegård Formation (late Katian–early Hirnantian), with the oldest record just above the first appearance of the graptolite species Dicellograptus complanatus. This represents the earliest record of early land plant spores from Sweden and possibly also from Baltica and implies that land plants had migrated to the palaeocontinent Baltica by at least the Late Ordovician.

Keywords

  • Geology
  • Stratigraphy
  • palynology
  • Thermal Alteration Index (TAI)
  • Ordovician
  • Silurian
  • Röstånga-1 drillcore
  • Skåne
  • Sweden

Other

Published
  • ISSN: 2000-0863
Per Ahlberg
E-mail: per [dot] ahlberg [at] geol [dot] lu [dot] se

Professor

Lithosphere and Biosphere Science

+46 46 222 78 70

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