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131.
132.
Revealing the coastal event-history of the Andaman Islands (Bay of Bengal) during the Holocene using radiocarbon and OSL dating 总被引:1,自引:0,他引:1
Alexander Kunz Manfred Frechen Ramachandran Ramesh Brigitte Urban 《International Journal of Earth Sciences》2010,99(8):1741-1761
Earthquakes that trigger tsunamis are of great geological, ecological and socio-economic importance. The knowledge of the
recurrence interval of these events will give information about the hazard for a region. Coastal sediments on the Andaman
Islands located in the eastern Bay of Bengal were investigated to find evidence for palaeotsunamis and palaeoearthquakes.
Fieldwork was conducted on Red Skin Island and North Cinque Island, south of South Andaman. Sediment material from event-layers
was dated by optically stimulated luminescence and radiocarbon dating method. The results show evidence possibly for one earthquake
at about 1,000 or 3,000 years before the present together with deposits from possible tsunamis and storms. The complex pattern
of co- and post-seismic uplift and subsidence of the Andaman Islands is reflected in the investigated sections and made it
possible to reconstruct an event-history for the last 3,000 years. 相似文献
133.
Nissrine Maad Pascal Le Roy Mohamed Sahabi Marc-André Gutscher M. Hssain Nathalie Babonneau Marina Rabineau Brigitte Van Vliet Lanoë 《Comptes Rendus Geoscience》2010,342(9):731-740
A recent high resolution seismic survey was carried out along the North-West Moroccan Atlantic continental shelf to perform sequence stratigraphy and to better understand the link between the onshore observations across the western termination of the Rif front and the multibeam bathymetric data previously collected across the Gulf of Cadiz. Seismic interpretation clearly shows evidence of deformation affecting the Pleistocene sedimentary cover. This is mainly located between the Lalla Zahra ridge and the Neogene nappes that outcrop at the seabed to the North of Larache, where the identified structures bound the upper part of a gravitationally spreading lobe and are interpreted to be developed by activation of the major tectonic structures located at the southern front of the Rif Cordillera. The offshore extension of the Lalla Zahra Ridge is characterised by an east-west trending major folded and faulted corridor. This structure marks the active front of Prerifan area and corresponds to a major Quaternary kinematic boundary in the western prolongation of the ENE-WSW trending Jebha fault. 相似文献