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The “Pink Granite” Coast (Northern Brittany)

  • Yannick LageatEmail author
Chapter
Part of the World Geomorphological Landscapes book series (WGLC)

Abstract

The “Pink Granite” coast, in northern Brittany, some 30 km long, is more familiar to tourists than to geomorphologists. The following paper highlights the limitations of the explanations propounded to the 700,000 visitors who annually come to admire the fantastic shapes into which the coarse-grained granites, which are reddish in fact, have been eroded. The occurrence of assemblages of boulder piles involves their subsurface initiation by differential weathering and the stripping of the saprolite by marine processes. Following their exhumation, basins and flutes have developed on the granite outcrops under subaerial conditions. At all scales of analysis, the “Pink Granite” coast exhibits an assemblage of landforms, which are not specific of coastal environments, illustrating the concept of convergence or equifinality, that is, the production of similar landforms by different processes.

Keywords

Granite Weathering Boulders Platforms Denudation coast 

Notes

Acknowledgements

I thank the guest editors Professor Marie-Françoise André (University Blaise Pascal, Clermont-Ferrand 2) and Professor Monique Fort (University Denis Diderot, Paris 7) for their invitation to prepare this paper. I am especially grateful to my sister Maryvonne Le Rouzic who improved the form of the original manuscript, to Laurence David who revised the Figs. 6.2 and 6.3 and to an anonymous referee who provided helpful reviews, and I am deeply indebted to Professor Dominique Sellier (University of Nantes) for a stimulating dialogue over the years.

References

  1. Barrière M (1977) Le complexe de Ploumanac’h (Massif armoricain). Essai sur la mise en place et l’évolution pétrologique d’une association plutonique subalcaline tardi-orogénique. Thesis of geology, University of BrestGoogle Scholar
  2. Battistini R, Martin S (1956) La “plate-forme à écueils” du nord-ouest de la Bretagne. Norois 10:147–161CrossRefGoogle Scholar
  3. Godard A (1977) Pays et paysages du granite. Introduction à une géographie des domaines granitiques. P.U.F, ParisGoogle Scholar
  4. Godard A, Lagasquie JJ, Lageat Y (2001) Basement regions. Springer, BerlinCrossRefGoogle Scholar
  5. Janvier TA (1904) A Breton shrine. Harper’s Monthly Magazine, 109, 650:276–287Google Scholar
  6. Lageat Y (1981) Contribution à la connaissance de la porosité des roches cristallines. Physio-Géo 1:3–33Google Scholar
  7. Lageat Y, Nicolazo J (2009) L’invention de la Côte de Granite Rose (Bretagne) et les étapes de la valorisation d’un géomorphosite. Bull Assoc Géogr Franç 2:124–135Google Scholar
  8. Lageat Y, Sellier D, Twidale CR (1994) Mégalithes et météorisation des granites en Bretagne littorale. France du Nord-Ouest. Géogr Physique et Quaternaire 48:107–113CrossRefGoogle Scholar
  9. Le Goffic C (1920) Alerte pour Ploumanac’h. Un des plus renommés paysages de Bretagne est menacé. Bull Soc Protection des Paysages de France 86:12–14Google Scholar
  10. Martonne E de, Robert E (1904) Excursion géographique en Basse-Bretagne (Monts d’Arrée-Trégorrois). Bull Soc Scient Et Méd de l’Ouest XIII:293–334Google Scholar
  11. Migon P (2006) Granite landscapes of the world. Oxford University Press, OxfordGoogle Scholar
  12. Miller KG, Wright JD, Browning JV, Kulpeez A, Kominz M, Naish TR, Cramer BS, Rosenthal Y, Peltier WR, Sosdian S (2012) High tide of the warm Pliocene: implications of global sea level for Antarctic deglaciation. Geology 40:407–410CrossRefGoogle Scholar
  13. Rondeau A (1959) Corse et Bretagne: à propos du modelé granitique de la région de Trégastel (Côtes-du-Nord). Norois 20:451–457CrossRefGoogle Scholar
  14. Rondeau A (1978) Sur le comportement des leucogranites (ex-“granulites”) en milieu littoral. Bull Assoc Géogr Franç 449:47–49Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Géomer-LETG, UMR 6554-CNRSUniversity of Western BrittanyPlouzanéFrance

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