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A reworked isolated deposit of the Kos Plateau Tuff and its significance for dating raised marine terraces, Kos, Greece

Published online by Cambridge University Press:  21 April 2020

David J.W. Piper Open the ORCID record for David J.W. Piper [Opens in a new window]  and
Georgia Pe-Piper
David J.W. Piper*
Affiliation:
Natural Resources Canada, Geological Survey of Canada (Atlantic), Bedford Institute of Oceanography, Dartmouth, Nova ScotiaB2Y 4A2, Canada
Georgia Pe-Piper
Affiliation:
Department of Geology, Saint Mary’s University, Halifax, Nova Scotia, B3H 3C3, Canada
*
Author for correspondence: David J.W. Piper, Email: [email protected]
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Abstract

The 161-ka Kos Plateau Tuff (KPT) eruption deposited widespread unwelded ignimbrites, but the Dikeos and Sympetro mountains on the SE of Kos Island blocked all but the most energetic pyroclastic flows. KPT remnants north of Sympetro mountain comprise reworked tuffite containing pumice and lithic clasts that petrologically and geochemically resemble those found in KPT unit E tephra, and reworked accretionary lapilli similar to those in KPT unit F. Tuffite is found only downslope from a 375-m-high pass between the Dikeos and Sympetro mountains, which was breached at the eruption climax by pyroclastic flows that then accelerated down the 10° north slope of Sympetro. The tuffite crops out in the palaeocliffs of a prominent terrace at an elevation of 75 m, interpreted as the transgressive ravinement surface of the first interglacial marine highstand after the KPT eruption during marine isotope stage (MIS) 5e. A similar ravinement surface cuts KPT deposits in central Kos at elevations of up to 135 m and implies post-MIS 5e uplift rates of 0.7–1.0 m ka−1, confirmed by the elevation of a previously reported raised beach beneath the KPT. A Holocene raised beach on the east coast of Kos contains pumice clasts from the Yali-4 eruption at 4–3 ka. Its elevation of 2 m above sea level is consistent with the elevation of the local MIS 5e terrace. Its present erosion results from the blocking of discharge from ephemeral streams by human infrastructure. Our study provides the first integrated chronologic and neotectonic interpretation of the prominent plateau and terrace surfaces on Kos Island.

Keywords

tuffitepumicepetrographygeochemistryraised beachSouth Aegean arc
Type
Original Article
Information
Geological Magazine , Volume 157 , Issue 12 , December 2020 , pp. 2021 - 2032
Copyright
© Cambridge University Press 2020

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References

Allen, SR (2001) Reconstruction of a major caldera-forming eruption from pyroclastic deposit characteristics: Kos Plateau Tuff, eastern Aegean Sea. Journal of Volcanology and Geothermal Research 105, 141–62.CrossRefGoogle Scholar
Allen, SR and Cas, RA (2001) Transport of pyroclastic flows across the sea during the explosive, rhyolitic eruption of the Kos Plateau Tuff, Greece. Bulletin of Volcanology 62, 441–56.CrossRefGoogle Scholar
Allen, SR and McPhie, J (2000) Water-settling and resedimentation of submarine rhyolitic pumice at Yali, eastern Aegean, Greece. Journal of Volcanology and Geothermal Research 95, 285–307.CrossRefGoogle Scholar
Allen, SR, Stadlbauer, E and Keller, J (1999) Stratigraphy of the Kos Plateau Tuff: product of a major Quaternary rhyolitic eruption in the eastern Aegean, Greece. International Journal of Earth Science 88, 132–56.CrossRefGoogle Scholar
Allen, SR, Vougioukalakis, GE, Schnyder, C, Bachmann, O and Dalabakis, P (2009) Comments on: On magma fragmentation by conduit shear stress: Evidence from the Kos Plateau Tuff, Aegean Volcanic Arc, by Palladino, Simei and Kyriakopoulos (JVGR (2008) 178, 807–817). Journal of Volcanology and Geothermal Research 184, 487–90.CrossRefGoogle Scholar
Bianchi, CN, Corsini-Foka, M, Morri, C and Zenetos, A (2014) Thirty years after – dramatic change in the coastal marine habitats of Kos Island (Greece), 1981–2013. Mediterranean Marine Science 15, 482–97.CrossRefGoogle Scholar
Böger, H, Gersonde, R and Willmann, R (1974) Das Neogen in Osten der Insel Kos (Ägäis, Dodekanes)−Stratigraphie und tektonik. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 145, 129–52.Google Scholar
Bouvet de Maisonneuve, C, Bachmann, O and Burgisser, A (2009) Characterization of juvenile pyroclasts from the Kos Plateau Tuff (Aegean Arc): insights into the eruptive dynamics of a large rhyolitic eruption. Bulletin of Volcanology 71, 643–58.CrossRefGoogle Scholar
Carey, S and Sparks, RSJ (1986) Quantitative models of the fallout and dispersal of tephra from volcanic eruption columns. Bulletin of Volcanology 48, 109–25.CrossRefGoogle Scholar
Keller, J, Rehren, TH and Stadlbauer, E (1990) Explosive volcanism in the Hellenic Arc: a summary and review. In Thera and the Aegean World III. (eds DA Hardy, J Keller, VP Galanopoulos, NC Flemming and TH Druitt), pp. 13–26. Proceedings of the Third International Congress on the Volcano of Thera, Santorini. Santorini, Greece, 3–9 September 1989. London: Thera Foundation.Google Scholar
Koutrouli, A, Anastasakis, G, Kontakiotis, G, Ballengee, S, Kuehn, S, Pe-Piper, G and Piper, DJW (2018) The early to mid-Holocene marine tephrostratigraphic record in the Nisyros-Yali-Kos volcanic center, SE Aegean Sea. Journal of Volcanology and Geothermal Research 366, 96–111.CrossRefGoogle Scholar
Liritzis, I, Michael, C and Galloway, RBA (1996) A significant Aegean volcanic eruption during the second millennium B.C. revealed by thermoluminescence dating. Geoarchaeology International 11, 361–71.3.0.CO;2-#>CrossRefGoogle Scholar
Pe-Piper, G and Piper, DJW (2005) The South Aegean active volcanic arc: relationships between magmatism and tectonics. Developments in Volcanology 7, 113–33.CrossRefGoogle Scholar
Pe-Piper, G, Piper, DJW and Perissoratis, C (2005) Neotectonics and the Kos Plateau Tuff eruption of 161 ka, South Aegean arc. Journal of Volcanology and Geothermal Research 139, 315–38.CrossRefGoogle Scholar
Piper, DJW, Pe-Piper, G, Anastasakis, G and Reith, W (2019) The volcanic history of Pyrgousa—volcanism before the eruption of the Kos Plateau Tuff. Bulletin of Volcanology 81, article no. 32.CrossRefGoogle Scholar
Piper, DJW, Pe-Piper, G and Lefort, D (2010) Precursory activity of the 161 ka Kos Plateau Tuff eruption, Aegean Sea (Greece). Bulletin of Volcanology 72, 657–69.CrossRefGoogle Scholar
Piper, DJW and Perissoratis, C (2003) Quaternary neotectonics of the South Aegean arc. Marine Geology 198, 259–88.CrossRefGoogle Scholar
Rabineau, M, Berné, S, Olivet, J-L, Aslanian, D, Guillocheau, F and Joseph, P (2006) Paleo sea levels reconsidered from direct observation of paleoshoreline position during Glacial Maxima (for the last 500,000 yr). Earth and Planetary Science Letters 252, 119–37.CrossRefGoogle Scholar
Sanders, D (2000) Rocky shore-gravelly beach transition, and storm/post-storm changes of a Holocene gravelly beach (Kos Island, Aegean Sea): stratigraphic significance. Facies 42, 227–44.CrossRefGoogle Scholar
Shackleton, NJ (1987) Oxygen isotopes, ice volume and sea level. Quaternary Science Reviews 6, 183–90.CrossRefGoogle Scholar
Taylor, B, Weiss, JR, Goodliffe, AM, Sachpazi, M, Laigle, M and Hirn, A (2011) The structures, stratigraphy and evolution of the Gulf of Corinth rift, Greece. Geophysical Journal International 185, 1189–219.CrossRefGoogle Scholar
Triantaphyllis, M (1998) Eastern Kos Sheet, 1:50,000 Geological Map. IGME, Athens.Google Scholar
Tzatzanis, M, Wrbka, T and Sauberer, N (2003) Landscape and vegetation responses to human impact in sandy coasts of Western Crete, Greece. Journal for Nature Conservation 11, 187–95.CrossRefGoogle Scholar
Willmann, R (1983) Neogen und jungtertiäre Entwicklung der Insel Kos (Ägäïs, Griechenland). Geologische Rundschau 72, 815–60.CrossRefGoogle Scholar