In this study we discuss temporal and spatial distribution patterns of the benthic foraminifera collected in cores comprising sediments of Holocene age. The specific aim of this paper is to document the paleoenvironmental changes in the Ombrone River delta area, by comparison with appropriate modern analogues. In this area, recent benthic foraminiferal assemblages have been extensively studied and a bathymetrical zonation parallel to the coast was defined. The quantitative and qualitative changes in foraminiferal assemblages reflect the impact of factors as organic matter and oxygen content, sediment type, and presence of seagrass. Seven cores collected in 1996 on the delta front (11-25.1 mwd) and on the outer continental shelf (76.4-105 mwd), were considered in this study. The cores mainly sampled sediment of unit A. The upper part of unit B was found only in one case. Micropaleontological analysis were integrated by radiocarbon dates and seismic stratigraphic profiles.
FORAMINIFERAL RECORD AND HIGH RESOLUTION SEISMIC STRATIGRAPHY OF THE LATE HOLOCENE DELTAIC SUCCESSION OF THE OMBRONE RIVER (NORTHERN TYRRHENIAN SEA, ITALY) / DI BELLA, Letizia; Frezza, Virgilio; L., Bergamin; Chiocci, Francesco Latino; F., Falese; E., Martorelli; C., Tarragoni; Carboni, Maria Gabriella. - STAMPA. - (2012), pp. 24-25. (Intervento presentato al convegno INQUA SEQS 2012 MEETINGAT THE EDGE OF THE SEA: SEDIMENTS, GEOMORPHOLOGY, TECTONICS, AND STRATIGRAPHY IN QUATERNARY STUDIES. tenutosi a Sassari nel 26-30Settembre 2012).
FORAMINIFERAL RECORD AND HIGH RESOLUTION SEISMIC STRATIGRAPHY OF THE LATE HOLOCENE DELTAIC SUCCESSION OF THE OMBRONE RIVER (NORTHERN TYRRHENIAN SEA, ITALY).
DI BELLA, Letizia;FREZZA, Virgilio;CHIOCCI, Francesco Latino;CARBONI, Maria Gabriella
2012
Abstract
In this study we discuss temporal and spatial distribution patterns of the benthic foraminifera collected in cores comprising sediments of Holocene age. The specific aim of this paper is to document the paleoenvironmental changes in the Ombrone River delta area, by comparison with appropriate modern analogues. In this area, recent benthic foraminiferal assemblages have been extensively studied and a bathymetrical zonation parallel to the coast was defined. The quantitative and qualitative changes in foraminiferal assemblages reflect the impact of factors as organic matter and oxygen content, sediment type, and presence of seagrass. Seven cores collected in 1996 on the delta front (11-25.1 mwd) and on the outer continental shelf (76.4-105 mwd), were considered in this study. The cores mainly sampled sediment of unit A. The upper part of unit B was found only in one case. Micropaleontological analysis were integrated by radiocarbon dates and seismic stratigraphic profiles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
