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A New Record of Boudinage-structure from Scotland

Published online by Cambridge University Press:  01 May 2009

Robert Walls
Robert Walls
Affiliation:
Beit Scientific Research Fellow, Imperial College of Science and Technology, London.
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Extract

The peculiar tectonic structure called “boudinage” by Lohest (5, pp. 471–2), has recently been found in Unst, Shetland Islands, by Professor H. H. Read (8, pp. 134–8), who has also noted its occurrence in tie Durn Hill quartzites of Banffshire (9, p. 471).What would now be termed boudinage-structure was seen by Ramsay in North Wales, and was described in 1866 in these words (6, and. fig. 18): “In the great quarry west of the Ffestiniog and Trawsfynydd fault the cleavage dips from 45° to 50° north-west, the inclination of the beds being about 35° in the same direction, and a greenstone dyke runs through them between the cleavage-planes…, bulging and thinning off in a rapid succession of oval-shaped masses of 3 or 4 feet in length. Associated with it are quartz veins ccurring principally at the points between the separate bulgings of the greenstone.”

Type
Original Articles
Information
Geological Magazine , Volume 74 , Issue 7 , July 1937 , pp. 325 - 332
Copyright
Copyright © Cambridge University Press 1937

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References

1. Corin, F. “A propos du boudinage en Ardenne,” Bull. Soc. beige de Géol., xlii, 1932, 101–117.Google Scholar
2. Gosselet, J. “L'Ardenne” (Memoires pour servir à l'explication de la carte géologique detaillée de la France), Paris, 1888.Google Scholar
3. Harker, A. “On the local thickening of dykes and beds by folding,” GEOL. MAG., 1889, p. 69.CrossRefGoogle Scholar
4. Holmquist, P. J. “The relative plasticity of rock-masses under the influence of dynamic deformation,” Fennia, 50, No. 33, 1928, 1–13.Google Scholar
5. Lohest, M., Stanier, X., and Foumarier, P. “Compte rendu de la Session extraordinaire de la Soeiété géologique de Belgique, tenue á Eupen et á Bastogne…,” Ann. Soc. géol. de Belgique, xxxv, 1909, B 351–434.Google Scholar
6. Ramsay, A. C. “The Geology of North Wales,” Memoirs of the Geological Survey of Great Britain, iii, 1866, 75.Google Scholar
7. Read, H. H. “The geology of the country round Banff, Huntly and Turriff” (Explanation of Sheets 86 and 96), Memoirs of the Geological Survey, Scotland, Edinburgh, 1923.Google Scholar
8. Read, H. H. “On the segregation of quartz-chlorite-pyrite masses in Shetland igneous rocks during dislocation metamorphism, with a note on an occurrence of boudinage-structure,” Proc. Liverpool Geol. Soc., xvi, pt.3, 1934, 134–8.Google Scholar
9. Read, H. H. “The stratigraphical order of the Dalradian rocks of the Banffshire coast,” GEOL. MAG., LXXIII, 1936, 468–476.CrossRefGoogle Scholar
10. Wegmann, C. E. “Note sur le boudinage,” Bull. Soc. géol. France, 5, ii, 1932, 477–489.Google Scholar