Palaeomagnetic constraints in the early-middle Ordovician palaeogeography of Europe: recent advances

Allan Trench, T. H. Torsvik

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

New palaeomagnetic data from Baltica and southern Britain has greatly changed the perception of European Ordovician geography. Baltica has advanced from being "a continent without a Lower Palaeozoic apparent polar wander path', to perhaps the best constrained of the Iapetus-bordering continents. In Tremadoc-Arenig times, Baltica was positioned in mid-southerly latitudes (30-50°S), but was rotated with respect to its present orientation. The continent then drifted northwards durihg Ordovician time whilst undergoing counterclockwise rotation. By mid-Silurian times, Baltica had reached an equatorial position. New palaeomagnetic data from southern Britain reconcile a long-standing conflict between palaeomagnetic and biogeographic interpretations for the width of the Iapetus Ocean. These data indicated that northern and southern Britain were separated by c.45° of latitude in Tremadoc-Arenig times, which was reduced to c.30° by end Llanvirn times. -from Authors

Original languageEnglish
Pages (from-to)255-259
Number of pages5
JournalGlobal perspetives on Ordovician geology
Publication statusPublished - 1 Jan 1992

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