Lyell Collection

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Search for Related Content GeoRef GeoRef Citation

Discussion on Silurian and Early Devonian sinistral deformation of the Ratagain Granite, Scotland: constraints on the age of Caledonian movements on the Great Glen system

B. C. Lintern, R. P. Barnes & P. Stone write: Hutton & McErlean (1991) provide convincing evidence for two distinct phases of sinistral movement on the Strathconan Fault, the first during the mid-Silurian (Wenlock, c. 425 Ma) and the second during the Early Devonian. They conclude that the Early Devonian (c. 400 Ma) low temperature shearing and brittle faulting event is well documented elsewhere in the British Caledonides and can be regarded as one of the consequences of the final collision between Laurentia and Avalonia. However, no correlatives of the earlier Wenlock (c. 425 Ma) event were discussed and they considered that ‘...it remains to be seen how common a sinistral event of this age is in the rest of the British Caledonides’.

Recently, we presented a summary of available tectono-stratigraphical and isotopic age data (Barnes et al. 1989, fig. 1) which constrained the timing of the culmination of deformation in the Southern Uplands thrust stack to within the M. riccartonensis biozone (c. 424 Ma) of the Wenlock. Sinistral shear during the final stages of this diachronous event (e.g. Anderson 1987; Barnes et al. 1989) produced, at the thrust front, such variation in the plunge of first-phase folds that they are locally downward facing and form steeply-plunging sinistral fold pairs. Contemporaneously the older, previously deformed parts of the thrust belt hinterland were subjected to localized folding and shearing associated with sinistral wrench movements on and adjacent to steepened early thrusts such as the Orlock Bridge Fault (Anderson & Oliver 1986)

...

This 250-word extract was created in the absence of an abstract.

This article has been cited by other articles:

				R. E. Holdsworth, R.E. Holdsworth, E. Tavarnelli, P. Clegg, R.V.L. Pinheiro, R.R. Jones, and K.J.W. McCaffrey Domainal deformation patterns and strain partitioning during transpression: an example from the Southern Uplands terrane, Scotland Journal of the Geological Society, 2002; 159: 401 - 415. [Abstract] [Full Text] [PDF]

				R. P. Barnes, G. M. Power, and D. C. Cooper The definition of sandstone-bearing formations in the Isle of Man and correlation with adjacent areas -- evidence from sandstone chemistry Geological Society, London, Special Publications, 1999; 160: 139 - 154. [Abstract] [PDF]

				R. P. Barnes and P. Stone Trans-Iapetus contrasts in the geological development of southern Scotland (Laurentia) and the Lakesman Terrane (Avalonia) Geological Society, London, Special Publications, 1999; 160: 307 - 323. [Abstract] [PDF]

				E. R. Phillips, R. P. Barnes, M. P. Boland, N. J. Fortey, and A. A. McMillan The Moniaive Shear Zone: a major zone of sinistral strike-slip deformation in the Southern Uplands of Scotland Scottish Journal of Geology, 1995; 31: 139 - 149. [Abstract] [PDF]

				P. Stone, P. M. Green, B. C. Lintern, P. R. Simpson, and J. A. Plant Regional geochemical variation across the Iapetus Suture zone: tectonic implications Scottish Journal of Geology, 1993; 29: 113 - 121. [Abstract] [PDF]

• Home  |  
• Current issue  |  
• Table of contents  |  
• Archive  |  
• Search  |  
• Feedback

• Copyright policy  |  
• Permissions request   |  
• Terms of use   |  
• Feedback   |  
• HighWire Press