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| Titel |
Preliminary geochemical data on shallow marine mollusc from middle Pleistocene-Holocene beach ridges in the gulf of S. Jorge (Patagonia, Argentina) |
| VerfasserIn |
Ilaria Consoloni, Giovanni Zanchetta, Marina L. Aguirre, Ilaria Baneschi, Gabriella M. Boretto, Luigi Dallai, Massimo D'Orazio, Anthony E. Fallick, Ilaria Isola, Marta Pappalardo Adriano Ribolini |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250044565
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| Zusammenfassung |
| The Patagonia coast comprised between ca 45Ë S and 43Ë S preserves a spectacular
succession of Quaternary raised beach deposits mostly composed by gravelly beach-ridge
successions containing abundant storm accumulations of mollusc remains. Currently, this
coastal area is interested by the competing action of the warm Brazilian current from north
and the Falkland (Malvinas) current from the south, and roughly it corresponds to the
boundary of the Magellanean and Argentinean zooprovinces. Although paleontological
studies have been conducted in the recent past (e.g. Aguirre, 2003) there are not practically
geochemical studies on these natural archives to infer local paleoceanographic and
paleoclimate changes. Preliminary geochemical studies (petrography, stable isotopes, trace
elements) on the aragonitic shell Prototaqua antiqua collected in various localities spanning
from Holocene to Middle Pleistocene (MIS 9 to MIS 1, e.g. Schellmann and Radke,
2000) successions indicate that this species is relatively well preserved and can
be used for the reconstruction of the past coastal oceanographic changes in the
area.
Aguirre, M.L., 2003. Late Pleistocene and Holocene palaeoenvironments in Golfo San
Jorge, Patagonia: molluscan evidence. Marine Geology 194, 3–30.
Schellmann, G., Radtke, U., 2000. ESR dating of stratigraphically well-constrained
marine terraces along the Patagonian Atlantic coast (Argentina). Quaternary International
68/71, 261–273. |
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