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Journal of the Geological Society; 2006; v. 163; issue.3; p. 461-469;
DOI: 10.1144/0016-764905-099
© 2006 Geological Society of London

Original Article

Timing of deformation within Old Red Sandstone lithologies from the Dingle Peninsula, SW Ireland

Patrick A. Meere1 & Kieran F. Mulchrone2

1 Department of Geology, National University of Ireland, Cork, Ireland (e-mail: p.meere@ucc.ie)
2 Department of Applied Mathematics, National University of Ireland, Cork, Ireland

Finite strain analysis of deformed clastic sedimentary rocks below and above the Acadian unconformity on the Dingle Peninsula, SW Ireland, reveals that this boundary represents a significant bulk strain discontinuity. The Late Emsian Acadian event is primarily responsible for penetrative cleavage development and high strain in rocks below the unconformity and not, as previously held, the later Variscan event, which overprinted the peninsula with a weak and localized disjunctive cleavage. The presence of apparent anticlockwise transecting cleavage and implied dextral closure of the Dingle Basin during the Acadian event is compatible with northward convergence of Armorica with respect to Eastern Avalonia.




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N.H. WOODCOCK, N.J. SOPER, and R.A. STRACHAN
A Rheic cause for the Acadian deformation in Europe
Journal of the Geological Society, 2007; 164: 1023 - 1036.
[Abstract] [Full Text] [PDF]