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V. Tselepidis, Th. Rondoyanni
V. Tselepidis, Th. Rondoyanni


Τhe island of Chios, in the eastern Aegean Sea, is of great geological interest due to the outcrops of the oldest Paleozoic rocks of the Hellenides. Three main geological units of Paleozoic and Mesozoic age dominate, that have a tectonic relationship: the Autochthonous unit is overthrusted by the Parautochthonous unit, which in turn is overthrusted by the Allochthonous unit. In this work, new geological and tectonic data concerning the Autochthonous unit and especially its part of the Paleozoic - Mesozoic transition are presented and evaluated. Due to the rare outcrops of this transition and the lack of sufficient palaeontological data, there are various and contradictory opinions concerning its normal or discordant character. Based on our field data and lithostratigraphic correlations, we can draw the following main results: Considering the Autochthonous unit, the transition of the Paleozoic formations to the Mesozoic ones is characterized by an angular unconformity as well as by a basal conglomerate. In some places there is a tectonic contact between them, this of a thrust fault. The Lower Triassic formations of the Parautochthonous unit belong to the Autochthonous unit, since they present similar palaeogeographic conditions. Moreover, the presence of the “Hallstatt” limestones in the Autochthonous unit can be explained by their local deposition in lenticular form.


Chios Island; Autochthonous Unit; Parautochthonous Unit;

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Besenecker, H., Durr, S., Herget, G., Jacobshagen, V., Kauffman, G., Ludtke, G., Roth, W. and Tietze,

K.V., 1968. Geologie von Chios (Agais). Geol. Palaeontol., 2, 121–150.

Besenecker, H., Durr, S., Herget, G., Kauffman, G., Ludtke, G., Roth, W. and Tietze, K., 1971. Geological

map of Greece. Chios, 1:50 000. IGME ed., Athens.

Herget, G., 1978. Die Geology von Nord-chios (Agais).Unpublished Ph.D. Thesis, Univ. of Marbrug.

Gaetani, M., Jacobschagen, V., Nicora, A., Kauffmann, G., Tselepides, V., Fantini-Sentini, N., Mertmann,

D and Skourtis-Coroneou, V., 1992. The Early-Middle Triassic Boundary st Chios (Greece). Riv. Ital.

XLIII, No 1 – 385

Paleontol. Stratigraf., 98, 181-204.

Grooves, J., Larghi, C., Nicora, A., Rettori, R., 2003. Mississipian (Lower Carboniferous) microfossils

from the Chios Melange (Chios island, Greece). Geobios, 36, 379-389.

Kauffmann, G., 1969. Die Geology von Nord-chios (Agais).Unpublished Ph.D. Thesis, Univ. of Marbrug.

Ktenas, K., 1921. Sur la decouverte du devonien a l’ile de Chio (Mer Egee). C.R.somm. Soc. Geol.

France, 170-172.

Papanikolaou, D., Sideris, C.H., 1983. Le Palaeozoique de l’autochtone de Chios: une formation a blocks

de type wildflysch d’ age Permien. C.R.A.Sc., 297, 603-606.

Robertson, A., Pickett, E., 2000. Palaeozoic-early Tertiary evolution of melanges, rift and passive margin

units in the Karaburun peninsula (western Turley) and Chios island (Greece). In tectonics and

Magmatism in Turkey and the Surrounding area. Geological Society of London, Special publication,

, 43-82.

Roth, G., 1968. Die Geology von Nord-chios (Agais).Unpublished Ph.D. Thesis, Univ. of Marbrug.

Tselepidis, V., 2007. Palaeontological and stratigraphic study of the Epidavros ammonites. Contribution

to the knowledge of the “Hallstatt” facies in the Hellenides. Ph.D. Theseis, University of Thessaloniki

(in Greek)

Zachi, A., Garzanti, E., Larghi, C., Angiolini, L. and Gaetani, M., 2003. The Variscan orogeny in Chios

(Greece): Carboniferous accretion along a Palaeotethyan active margin. Terra Nova, 15/3, 213-223.


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