A multidisciplinary study was carried out on core C106 collected in the Salerno Gulf (southern Tyrrhenian Sea).Two tephra layers recovered in the core, N18O record of Globigerinoides ruber and Globigerina bulloides and seven 14Ccalibrated ages provided the stratigraphic framework. The core sediments cover the last 28 kyr BP. Seismostratigraphicanalysis of a high resolution acoustic profile, integrated by the dated core samples, allowed us toreconstruct the architecture and age of sedimentary bodies on the continental shelf. An integrated study based ondifferent taxonomic groups (nannofossils, pteropods, foraminifera, and palynomorphs) provided palaeoclimatictrends, in agreement with changes in the isotopic composition of oxygen. The upper part of the Last Glacial period,the deglaciation phase and the Holocene were identified. Correlation between marine and continental records ofpalaeoenvironmental changes confirms a similar reconstruction of the last deglaciation as in the central and southernMediterranean Sea. The Late Pleistocene^Holocene boundary was recognised at about 11.7 kyr BP. Between about9.5 and 6 kyr BPand at 3.3 kyr BP some warmer episodes were recorded. The measured lower isotopic values,together with some features of the fossil assemblages recorded from 9.5 to 6 kyr BP, may be related to theoceanographic setting that led to the deposition of Sapropel S1 in the Mediterranean basin.
A high resolution record of the last deglaciation in the southern Tyrrhenian Sea: environmental and climatic evolution
SENATORE M;
2002-01-01
Abstract
A multidisciplinary study was carried out on core C106 collected in the Salerno Gulf (southern Tyrrhenian Sea).Two tephra layers recovered in the core, N18O record of Globigerinoides ruber and Globigerina bulloides and seven 14Ccalibrated ages provided the stratigraphic framework. The core sediments cover the last 28 kyr BP. Seismostratigraphicanalysis of a high resolution acoustic profile, integrated by the dated core samples, allowed us toreconstruct the architecture and age of sedimentary bodies on the continental shelf. An integrated study based ondifferent taxonomic groups (nannofossils, pteropods, foraminifera, and palynomorphs) provided palaeoclimatictrends, in agreement with changes in the isotopic composition of oxygen. The upper part of the Last Glacial period,the deglaciation phase and the Holocene were identified. Correlation between marine and continental records ofpalaeoenvironmental changes confirms a similar reconstruction of the last deglaciation as in the central and southernMediterranean Sea. The Late Pleistocene^Holocene boundary was recognised at about 11.7 kyr BP. Between about9.5 and 6 kyr BPand at 3.3 kyr BP some warmer episodes were recorded. The measured lower isotopic values,together with some features of the fossil assemblages recorded from 9.5 to 6 kyr BP, may be related to theoceanographic setting that led to the deposition of Sapropel S1 in the Mediterranean basin.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
