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| Titel |
First evidence of accumulation of mega boulders on the Mediterranean rocky coast of Provence (southern France) |
| VerfasserIn |
C. Vella, F. Demory, V. Canut, P. Dussouillez, T. J. Fleury |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 3 ; Nr. 11, no. 3 (2011-03-23), S.905-914 |
| Datensatznummer |
250009270
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| Publikation (Nr.) |
 copernicus.org/nhess-11-905-2011.pdf |
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| Zusammenfassung |
| An accumulation of boulders was recently discovered along the rocky coast of
the Gulf of Fos located in Provence, in an area exposed to a south-westerly
wave regime. The coast around this locality forms the western extremity of
the calcareous Nerthe range between Marseille and the Rhône Delta.
Several mega blocks are scattered to a distance of 30 m behind the coast
line. The largest block (33.5 tonnes) has been transported about 39 m
inland, up to about 2 m a.s.l. On the Mediterranean coast, the origin of
such blocks is often attributed to tsunami-generated waves, but in the case
examined here, although the origin is unclear, the differences in surface
state between boulders indicates several events generated by south-westerly
storms. Radiocarbon dating on several different shells collected from seven
different boulders yields a wide dispersion of ages ranging from 4000 BP to
the Modern Period. The differences in surface appearance, as well as the
differences of fauna conservation and surface coloration, in some cases in a
very fresh state, along with the dispersion of radiocarbon ages, suggest that
historic storm events have affected these megablocks. |
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