POST- ALPINE LATE PLIOCENE – MIDDLE PLEISTOCENE UPLIFTED MARINE SEQUENCES IN ZAKYNTHOS ISLAND


M. Papanikolaou
D. Papanikolaou
M. Triantaphyllou
Résumé
Post-orogenic marine sequences crop out in two areas of Zakynthos Island: a) In Gerakas peninsula at the southeastern edge of the island and b) Along the coastal zone of central northern Zakynthos from Alikanas in the west to Zakynthos town in the east. Detailed stratigraphic analysis of Gerakas area has shown the existence of three formations separated by two unconformities: 1) Gerakas Fm Q1 comprising marls of Late Pliocene–Early Pleistocene age (2.8 – 0.9 Ma). 2) Kalogeras Fm Q2 comprising littoral sandstones at the base (Q2a), alternations of sandstones and marls in the middle (Q2b) and marls (e.g. Porto Roma) in the upper part (Q2c). The age of this formation is middle Pleistocene (0,8 – 0,5 Ma). 3) Agios Nikolaos Fm Q3 comprising littoral sandstones. Stratigraphic correlations between the two aforementioned areas have been made and equivalent stratigraphic formations, slightly differentiated in the central northern Zakynthos, have been identified. The upper unconformity is well pronounced in the area of Cape Gaidaros whereas the lower unconformity is often masked by debris accumulated along the base of the cliffs produced by the compact sandstones of Q2a above the soft marls of the underlying Q1. A remarkable increase in the thickness of the middle member Q2b is observed in the northern part with respect to the equivalent Kalogeras Fm in Gerakas area. In contrast, the thickness of the upper member (Q2c) is highly reduced in the limited northern outcrops compared to those of the southeastern exposure. The Plio-Quaternary post-orogenic marine deposits in both regions represent the creation of the accommodation space formed by the westernmost extensional structure of the Hellenic arc. The two unconformities reflect sea-level changes during the Quaternary within an overall tectonic uplift of Zakynthos Island at the front of the Hellenic arc and trench system, while the entire post-orogenic sequence reflects the intense palaeoclimatic fluctuations of the Quaternary.
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  • Rubrique
  • Neotectonics and Geomorphology
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Références
Aubouin, J., Bonneau, M., Davidson, L., Leboulenger, P., Matesco, S., Zambetakis, A., 1976. Esquisse structurale
de l` arc egeen externe: des Dinarides aux Taurides. Bull. Soc. Geol. France, XVII, 2, 327-336.
Bizon, G. and Müller, G., 1977. La limite Pliocene-Pleistocene dans l` île de Zante. La coupe de la Citadelle.
C.R. Somm. Soc. Geol. Fr., 4, 212-216.
Bizon, G. and Mirkou, R., 1967. Les foraminifères planktoniques du Pliocène de l` île de Zante (Grèce
occidentale). Proc. First. Inter. Conf. Plantk. Microf., 1, 188, Genova.
Blanc-Vernet, L. and Keraudren, B., 1969. Sur la présence du Calabrien a Hyalinea balthica dans les Iles
de Zakynthos et de Kephallinia (Grèce). Bull. Musée d` Anthrop. prehist. Monaco, 15, 91-106.
Broadley, L., Platzman, E., Platt, J., Papanikolaou, M., Matthews, S., 2006. Paleomagnetism and the tectonic
evolution of the Ionian zone, northwestern Greece, in Y. Dilek, and S.Pavlides, eds., Postcollisional
tectonics and magmatism in the Mediterranean region and Asia: Geological Society of America
Special Paper, 409.
McClusky, S., Balassanian, S., Barka, A., Demir, C., Ergintav, S., Georgiev, I., Gurkan, O., Hamburger,
M., Hurst, K., Kahle, H., Kastens, K., Kekelidze, G., King, R., Kotzev, V., Lenk, O., Mahmoud, S.,
Mishin, A., Nadariya, M., Ouzounis, A., Paradissis, D., Peter, Y., Prilepin, M., Reilinger, R., Sanli, I.,
Seeger, H., Tealeb, A., Toksoz, M.N., Veis, G., 2000. Global Positioning System constraints on plate
kinematics and dynamics in the Eastern Mediterranean and Caucasus. J. Geophys. Res., 105, B3,
–5719.
Dermitzakis, M., 1978. Stratigraphy and sedimentary History of the Miocene of Zakynthos (Ionian island,
Greece). Annales Géologiques des Pays Helleniques, 29, 47–186.
Dermitzakis, M., Papanikolaou, D., Karotsieris, Z., 1977. The marine quaternary formations of SE Zakynthos
island and their Paleogeographic implications. VI Colloquim on the Geology of the Aegean
Region. Institute of Geological and Mining Research. Reprinted from Proceedings, I, 407–415.
Duermeijer, C.E., Krijgsmana, W., Langereis, C.G., Meulenkamp, J.E., Triantaphyllou, M.V., Zachariasse,
W.J., 1999. A Late Pleistocene clockwise rotation phase of Zakynthos (Greece) and implications for
the evolution of the western Aegean arc. Earth and Planetary Science Letters, 173, 315–331.
Gibbard, P.L., Head, M.J., Walker, M.J.C. and the Subcommission on Quaternary Stratigraphy, 2009.
Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at
58 Ma. J. Quaternary Sci., ISSN 0267-8179.
McKenzie, D.P., 1972. Active tectonics of the Mediterranean region. Geophys. J. R. Astron. Soc., 30,
– 185.
Keraudren, B., 1970. Les Formations quaternaires marines de la Grèce. (Premiére Partie). Bull. De Mus.
D`Anthrop. Préhist. de Monaco, 6–153.
Kowalczyk, G., Muller, C. and Winter, K.-P., 1977. Nannofossils of the Calabrian deposits of Zakinthos
(Ionian Islands, Greece). N. Jb. Geol. Palaont. Mh, 5, 284-288.
LePichon, C. and Angelier, J. 1979. The Hellenic Arc and trench system: A key to the neotectonic evoXLIII,
No 1 – 484
lution of the Eastern Mediterranean area. Tectonophysics, 60, 1-42, 1979.
Mercier, J.L., Bousquet, B., Delibassis, N., Drakopoulos, J., Keraudren, B., Lemeille, F., Sorel, D., 1972.
Deformations en compression dans le quaternaire de ravafes ioniens (Cephalonie, Grece). Donnes
neotectoniques et sismiques. C. R. de l` Acad. Sci., Paris, 175, 2307–2310.
Mirkou-Peripopoulou, R.M., 1974. Stratigraphie et geologie de la partie septentrionale de l` ile de Zanthe
(Grece). Ann. Geol. Pays Hellen., 26, 35-108.
Mirkou, R.-M., 1987. Foraminiferes benthiques plio-pleistocenes de Zanthe. Interpretation paleobathymetrique.
Eclogae geol. Helv., 80, 1, 109-125.
Nikolaou, C., 1986. Contribution to the study of Neogene and Geological concepts of the Ionian and
Preapulian zone and their boundaries in relation to hydrocarbon exploration mainly on Strophades,
Zakynthos and Cephallonia. PhD thesis, National and Kapodistrian University of Athens, 350, Athens.
Papanikolaou, D., Fountoulis, I., Metaxas, C., 2007. Active faults, deformation rates and Quaternary paleogeography
at Kyparissiakos Gulf (SW Greece) deduced from onshore and offshore data. Quaternary
Int., 171–172, 14–30.
Papanikolaou, M.D., 2008. Quaternary palaeoenvironmental analysis of offshore and onshore marine sequences
in the Eastern Mediterranean. PhD thesis, University of Cambridge.
Reilinger, R., McClusky, S., Vernant, P., Lawrence, S., Ergintav, S., Cakmak, R., Ozener, H., Kadirov, F.,
Guliev, I., Stepanyan, R., Nadariya, M., Hahubia, G., Mahmoud, S., Sakr, K., ArRajehi, A., Paradissis,
D., Al-Aydrus, A., Prilepin, M., Guseva, T., Evren, E., Dmitrotsa, A., Filikov, S.V., Gomez, F., AlGhazzi,
R., Karam, G., 2006. GPS constraints on continental deformation in the Africa-Arabia-Eurasia
continental collision zone and implications for the dynamics of plate interactions. J. Geophys. Res.,
, B05411.
Rio, D., Raffi, I., Villa, G., 1990. Pliocene-Pleistocene calcareous nannofossil distribution patterns in the
western Mediterranean. In Kastens, K.A., Mascle, J., et al. (eds), Proc. Sci. Results ODP, 107, 513-
, ODP College Station, TX.
Suballyova, D., Tsaila-Monopolis, S., Gautier, F., 1999. Late Pliocene cyclicity on Zakynthos island (Eastern
Mediterranean): Palynological evidence; in Wrenn, J.H., Suc, J.P. and Leroy, S.A.G. (eds). The
Pliocene: Time of Change; American Association of Stratigraphic Palynologists Foundation, 93-101.
Triantaphyllou, M., 1993. Biostratigraphical and ecostratigraphical observations based on calcareous nannofossils
of the Eastern Mediterranean Plio-Pleistocene deposits. PhD thesis, National and Kapodistrian
University of Athens.
Τriantaphyllou, M.V., 1998. Revised biostratigraphy based on calcareous nannofossils of the Citadelle section,
Zakynthos island, Greece. J. Νannoplankton Res., 20, 31-35.
Triantaphyllou, M., Drinia, H., Dermitzakis, M.D., 1997. The Plio-Pleistocene boundary in the Gerakas
section, Zakynthos (Ionian Islands). N. Jb. Geol. Palaont. Mh, H.1, 12–30, Stuttgart.
Underhill, J.R., 1988. Triassic evaporites and Plio-Quaternary diapirism in western Greece. Journal Geological
Society of London, 145, 269–282.
Underhill, J.R., 1989. Late Cenozoic deformation of the Hellenide foreland, western Greece. Geological
Society of America Bulletin, 101, 613-634.
Zelilidis, A., Kontopoulos, N., Avramidis, P., Piper, D.J.W., 1998. Tectonic and sedimetnological evolution
of the Pliocene-Quaternary basins of Zakynthos island, Greece: case study of the transition from
compressional to extensional tectonics. Basin Research, 10, 393-408.
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