Record of a tectonically-controlled regression captured by changes in carbonate skeletal associations on a structured island shelf (mid-Pleistocene, Rhodes, Greece)

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doi: 10.1016/j.sedgeo.2012.11.001
Author(s): Titschack, Jürgen; Joseph, Nina; Fietzke, Jan; Freiwald, André; Bromley, Richard G.
Author Affiliation(s): Primary:
University of Bremen, Center for Marine Environmental Sciences, Bremen, Germany
Senckenberg am Meer, Abteilung für Meeresforschung, Germany
Helmholtz-Zentrum für Ozeanforschung Kiel, Germany
Volume Title: Sedimentary Geology
Source: Sedimentary Geology, Vol.283, p.15-33. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0037-0738 CODEN: SEGEBX
Note: In English. Supplemental information/data is available in the online version of this article. 102 refs.; illus., incl. strat. cols., 1 table, geol. sketch map
Summary: The Plio-Pleistocene warm-temperate carbonate deposits along the SE coast of Rhodes (Greece) formed on a highly structured island 'shelf' during a major transgression-regression cycle, which reached bathyal depth during maximal transgression. The complex palaeobathymetry exhibits many characteristics of submarine canyons, especially of so-called 'blind' or 'headless' canyons - a canyon type, which is especially common in the modern Mediterranean. This study presents the palaeoenvironmental evolution of one of these canyons, which is today represented by the Lardos valley, eastern central Rhodes. The studied section comprises the middle Pleistocene (900-300 ka) and describes a shallowing-upward trend from bathyal to circalitoral depth. Thin fossiliferous debris flow layers document turnovers and abundance changes in fauna and floral of hard-bottom communities, which developed on the adjacent basement slopes and highs. The comparison of the obtained results with other studies from the southeastern coast of Rhodes suggests a high degree of diachroneity of lithological boundaries of these Plio-Pleistocene deposits, which can be best explained by progressive infill of small depocentres located at different altitude levels. Hence, lithological changes are interpreted to be time-transgressive from distal (low altitude) to proximal (high altitude) during transgression while time-transgressive from proximal to distal during regression. Consequently, the best chronostratigraphic correlation horizon is the surface of maximal transgression. The most probable age for this surface could be estimated at 1.1 to 0.8 Ma, 0.2-0.5 Ma younger than previous estimates. Furthermore, the current lithostratigraphic schemes for the Plio-Pleistocene deposits of southeastern Rhodes are reviewed and revised. Abstract Copyright (2013) Elsevier, B.V.
Year of Publication: 2013
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Absolute age; Actinides; Aegean Islands; Algae; Anthozoa; Biostratigraphy; Cenozoic; Chronostratigraphy; Cluster analysis; Cnidaria; Correlation; Dates; Deep-water environment; Diachronism; Dodecanese; East Mediterranean; Europe; Field studies; Foraminifera; Geostatistics; Greece; Greek Aegean Islands; Invertebrata; Isotope ratios; Isotopes; Lardos Greece; Lardos Valley; Leg 160; Lithostratigraphy; Magnetostratigraphy; Marine environment; Mediterranean Sea; Mediterranean region; Metals; Microfossils; Middle Pleistocene; Multivariate analysis; Nannofossils; Nannoplankton; Neogene; O-18/O-16; ODP Site 967; Ocean Drilling Program; Oxygen; Piacenzian; Plankton; Plantae; Pleistocene; Pliocene; Principal components analysis; Protista; Quaternary; Radioactive isotopes; Regression; Revision; Rhodes; Sea water; Sea-level changes; Sediments; Shelf environment; Southern Europe; Stable isotopes; Statistical analysis; Structural controls; Tertiary; Trenching; U-238/U-234; Upper Pliocene; Uranium; Uranium disequilibrium; Variance analysis
Coordinates: N360300 N360600 E0280600 E0280000
Record ID: 2013068779
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands