Éditeur(s) : HAL CCSD Wiley
Résumé : Diversified deep-water corals and associated communities occur in early Pleistocene (early Calabrian; ∼1.7–1.6 Ma) calcareous crusts discovered on the south-western coast of Karpathos Island (eastern Greece). Apart from abundant and conspicuous solitary and colonial corals (12 species), the accompanying fauna comprises mostly bivalves (10 species), serpulid worms (4 species), and bryozoans (40 species). The growth and deposition of the studied organisms occurred in an upper bathyal environment at water depths around 400–600 m. The calculated mean uplift rate after deposition of the crusts indicates that Karpathos was drowned during the earliest Calabrian and experienced severe uplifts by the late Calabrian. A comparison between these communities and those of the Pleistocene to Recent Mediterranean and north-east Atlantic shows that a common stock of taxa exist(ed); among them two azooxanthellate colonial scleractinians (Lophelia pertusa and Madrepora oculata) are predominant.
ISSN: 0267-8179

hal-01622744
https://hal.archives-ouvertes.fr/hal-01622744
DOI : 10.1002/jqs.2966

Éditeur(s) : HAL CCSD Elsevier
Résumé : An integrated magneto-biostratigraphic study, based on calcareous nannofossils and foraminifers, together with the radiometric dating of a volcaniclastic layer found in several outcrops, was carried out on the hemipelagic deposits of the Lindos Bay Formation (LBF) at six localities on the island of Rhodes (Greece). Our highly refined chronostratigraphic framework indicates that the lower and upper lithostratigraphic boundaries of the LBF are diachronous. Associated with the 40Ar/39Ar age determination of 1.85 ± 0.08 Ma for the volcaniclastic layer, our data show that among the investigated outcrops, the Lindos Bay type locality section provides the longest record (1.1 Ma) of the LBF. Hemipelagic deposition occurred continuously from the late Gelasian (∼1.9 Ma) to the late Calabrian (∼0.8 Ma), i.e., from Chrons C2n (Olduvai) to C1r.1r (Matuyama) and from nannofossil Zones CNPL7 to CNPL10. This long record, together with the hemipelagic nature of the deposits, make the Lindos Bay type locality section a unique element in the eastern Mediterranean region, allowing future comparisons with other early Quaternary deep-sea sections available in the central and western Mediterranean regions.
ISSN: 0033-5894

hal-01467764
https://hal.archives-ouvertes.fr/hal-01467764
DOI : 10.1016/j.yqres.2016.05.002