Articles

TRIASSIC STRATIGRAPHY IN THE ISLAND OF HYDRA (GREECE)

LUCIA ANGIOLINI, LUCA DRAGONETTI, GIOVANNI MUTTONI, ALDA NICORA

Abstract


The Triassic sedimentary succession, cropping our in the island of Hydra, starts with a few metres of quartzarenites (Aghios Nikolaos Fm., Scythian) vertically making transition to a thick carbonate unit (Eros Lmst., Spathian-Pelsonian) subdivided into three lithozones and one member. During Pelsonian an extensional tectonic phase dissects the Eros carbonate platform. Its consequent downwarping results in the deposition of a pelagic sequence spanning the Pelsonian-Late Triassic time interval. This succession generally consists of few metres of nodular limestones (Han Bulog Lmst., Late Pelsonian-Early Ladinian) associated with green tuffs, followed by few hundred metres of cherty limestones (Adhami Lmst.). In the eastern part of the island a thick carbonate bank (Pantokrator Lmst.) develops, spanning the lllyrian to Late Triassic time interval. An overlying pelagic sequence, Jurassic in age, marks the downwarping of the Pantokrator carbonate platform. A typical passive continental margin succession is thus recorded in the Triassic of Hydra, suggesting its affinity with the Subpelagonian domain.

Keywords

Biostratigraphy; Foraminifers; Conodonts; Triassic; Hellenides.

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DOI: https://doi.org/10.13130/2039-4942/8933

NBN: http://nbn.depositolegale.it/urn%3Anbn%3Ait%3Aunimi-23608

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