Stratigraphic paleoecology of the Valle di Manche section (Crotone Basin, Italy): A candidate GSSP of the Middle Pleistocene
| Autor: | Luca Capraro, Sergio Raffi, John Warren Huntley, Daniele Scarponi |
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| Přispěvatelé: | Daniele Scarponi, John Warren Huntley, Luca Capraro, Sergio Raffi |
| Rok vydání: | 2014 |
| Předmět: |
Sequence stratigraphy
Middle Pleistocene Pleistocene Paleontology Macrofossil Structural basin Oceanography Sedimentary depositional environment Global Boundary Stratotype Section and Point Italy Paleoecology Bathymetry Mollusc Stratigraphic paleoecology Ecology Evolution Behavior and Systematics Geology Earth-Surface Processes |
| Zdroj: | Palaeogeography, Palaeoclimatology, Palaeoecology. 402:30-43 |
| ISSN: | 0031-0182 |
| Popis: | Macro-benthic assemblages from the Lower to Middle Pleistocene of the Valle di Manche (VdM) section (Crotone Basin, Southern Italy) were used to assess the value of merging paleoecological quantitative patterns into a sequence stratigraphic framework. Two-way cluster and detrended correspondence (DCA) analyses were applied to the macrofossil data matrix comprising 22 samples, 157 species and 5761 specimens. Specifically, two-way cluster analysis allowed for the characterization of five shelf-related biofacies and four sub-biofacies along section. Biofacies change along the VdM generally supported previous sequence stratigraphic interpretations and suggests that faunal turnover is the result of habitat tracking. DCA stratigraphic curves (= DC1 sample scores), calibrated to the depth preferences of extant species, provided quantitative estimates of bathymetry and the assessment of related parameters (e.g., grain-size, sedimentation/turbidity). When plotted stratigraphically, calibrated DC1 scores highlight the magnitude of relative sea-level fluctuations at the scale of the section as well as individual sequences and systems tracts. Additionally, DCA-derived paleobathymetric trends track the oscillations of the δ 18 O record, indicative of global sea-level change. Based on this comparison, it is held that macro-benthic assemblages, once supported by a robust statistical interpretation, can be employed successfully as a proxy for δ 18 O, depicting the variability in local water depths. The potential of this approach is especially high for studies in shallow-water depositional settings where dependable δ 18 O data are typically difficult to obtain. |
| Databáze: | OpenAIRE |
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