Download Active tectonics of the Hellenic subduction zone by Beth Shaw PDF

By Beth Shaw

This thesis is amazing for the big variety of the thoughts and observations used and for its insights, which go numerous disciplines. It starts off through fixing a well-known puzzle of the traditional international, that is what should be blamed for the tsunami that destroyed settlements within the japanese Mediterranean in 365 advert. by way of radiocarbon courting of preserved marine organisms, Shaw demonstrates that the full of western Crete was once lifted out of the ocean by means of as much as 10 meters in an important earthquake at the moment, which occured on a formerly unknown fault. the writer indicates that the ensuing tsunami may have the features defined by means of historic writers, and makes use of smooth GPS measurements and beach geomorphology to teach that the tension build-up close to Crete calls for this kind of tsunami-earthquake approximately each 6.000 years - a huge perception into Mediterranean tsunami chance. an in depth seismological learn of earthquakes within the Cretan arc over the past 50 years unearths different vital gains of its behaviour that have been formerly unknown. eventually, she offers basic insights into the restrictions of radiocarbon relationship marine organisms, on the subject of how they secrete carbon into their skeletons. The thesis ended in 3 significant papers in best journals.

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Stations are weighted by azimuth density, and then the weights of SH waveforms are halved to compensate for their generally larger amplitudes. The method and approach I used are described in detail elsewhere [46–49] and are too routine to justify detailed repetition here. A simple source-region velocity structure was specified, using up to a maximum of two layers and a water layer. This permits a different average velocity above the source (which determines the delay between direct and surface-reflected arrivals, and hence depth) from that below the source (which controls station positions on the focal sphere).

It is probable that the scarp of the Hellenic Trench is the surface expression of a steep (∼30◦ ) reverse fault splaying off the deeper underlying thrust-fault interface of the subduction zone (see Chap. 2). Where surface features are obscured or complicated, the obvious recourse is to look at earthquake focal mechanisms. g. [16–18]) show a bewildering variety of mechanisms associated with the subduction: normal, thrust and strike-slip fault-plane solutions with a range of orientations all apparently in nearly the same place.

Molnar, Surface uplift, uplift of rocks, and exhumation of rocks. Geology 18, 1173–1177 (1990) 10. Y. Thommeret, J. Thommeret, J. F. A. Pirazzoli, Late Holocene shoreline changes and seismo-tectonic displacements in western Crete (Greece). Zeitschrift für Geomorphologie Suppl. 40, 127–149 (1981) 11. S. Price, T. Higham, L. Nixon, J. Moody, Relative sea-level changes: reassessment of radiocarbon dates from Sphakia and west Crete. Annu. British Sch. Athens 97, 171–200 (2002) 12. A. L. Baillie, E.

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