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Per Ahlberg

Per Ahlberg

Professor emeritus

Per Ahlberg

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

Author

  • Ahmed Salah Badawy
  • Kristina Mehlqvist
  • Vivi Vajda
  • Per Ahlberg
  • Mikael Calner

Summary, in 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.

Department/s

  • Lithosphere and Biosphere Science

Publishing year

2014

Language

English

Pages

16-21

Publication/Series

GFF

Volume

136

Issue

1

Document type

Journal article

Publisher

Taylor & Francis

Topic

  • Geology

Keywords

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

Status

Published

ISBN/ISSN/Other

  • ISSN: 2000-0863