A reliable age for the louisburgh–clare island succession and its significance in the stabilisation of the laurentian margin in ireland

John R. Graham, Nancy R. Riggs, Brian McConnell

Research output: Contribution to journalArticle

Abstract

The Louisburgh–Clare Island succession is a sequence of non-marine sedimentary rocks that forms one element of the complex geology along the Fair Head–Clew Bay Line in western Ireland. A first reliable age for the succession is provided by U-Pb dating of zircon from a tuff within the Strake Banded Formation by LA-ICP-MS, giving an age of 423 ± 4Ma (Silurian: Ludfordian or Pridoli). This age indicates that the Louisburgh–Clare Island succession is younger than the other Silurian successions in the west of Ireland. It also better places the succession in a geological history of terrane accretion and basin evolution along the southeast Laurentian margin. The Strake Banded Formation displays a post-Ludfordian cleavage whereas mainly brittle deformation is seen in early to mid-Devonian sedimentary basins along strike.

Original languageEnglish (US)
Pages (from-to)5-14
Number of pages10
JournalIrish Journal of Earth Sciences
Volume38
DOIs
StatePublished - 2020

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'A reliable age for the louisburgh–clare island succession and its significance in the stabilisation of the laurentian margin in ireland'. Together they form a unique fingerprint.

  • Cite this