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Exploring the Avyssos-Yali-Strogyli submarine volcanic complex at the eastern edge of the Aegean Volcanic Arc
Authors
P. Nomikou Bell, K.L.C. Papanikolaou, D. Livanos, I. Martin, J.F.
Publication date
1 January 2013
Publisher
Abstract
The volcanic centers of Kos, Yali and Nisyros lie at the eastern edge of the Hellenic Volcanic Arc. Recent swath bathymetric surveys and seismic profiling, conducted by HCMR, led to the discovery of several submarine volcanic centers and massive underwater volcaniclastic deposits. Further research aboard the E/V "Nautilus" was conducted at the area in October 2010. Avyssos crater, located northeast of Strongyli islet, is believed to have been the original location of the massive eruption of Kos ignimbrite 160,000 years ago. Exploration of Avyssos showed that it the seafloor is mostly covered with fine-grained sediment full with traces of bioturbation. Hydrothermal activity was not evident at any point. Yali and Strongyli represent Late Pleistocene to Holocene volcanic islands that have developed between the islands of Kos and Tilos. ROV exploration of the eastern flank of Yali revealed wave-type sediment structures, as well as linear fractures at various depths. Several smaller craters were also discovered on the northwest slopes of Strongyli, aligned with ENE-WSW trending fractures with no signs of hydrothermal activity. Heavy biogenic encrustations cover the volcanic rock outcrops on the flanks of both Yali and Strongyli. Analysis of recovered samples will provide information about their relationship to the geology of the nearby islands. © 2013 Gebrüder Borntraeger Verlagsbuchhandlung
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Last time updated on 10/02/2023