Relative abundance fluctuations in planktic foraminiferal and calcareous nannofossil assemblages are reported onthe basis of a high-resolution study of ODP Leg 160 Hole 963D, drilled in the Sicily Strait, near Capo Rossello(southern Sicily). With its 8 m of undisturbed sediments, the core covers the interval from 1.5 to 23 kyr, allowing a50/100-yr sampling resolution. All the short warm and cold events and sub-events recorded in this time interval in theGRIP Greenland ice core and at several Mediterranean sites were recognized. On this basis, a total number of nineecozones based on planktic foraminifera and seven ecozones based on calcareous nannofossils were identified. A shortinterval of climatic amelioration, identified above the base of the Holocene, precedes the segment contemporaneouswith the deposition of sapropel S1, which has no lithological expression in the local sedimentary record. This segmenthas been subdivided into the two warm S1a and S1b phases, separated by a cold intermediate event. A gradualclimatic deterioration is recorded above the top of the interval correlated with sapropel S1. It is interrupted by shortcold spells, tentatively correlated with similar short duration cold events reported for this interval in the recentliterature.
|Numero di pagine||24|
|Rivista||PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY|
|Stato di pubblicazione||Published - 2003|
All Science Journal Classification (ASJC) codes
- Ecology, Evolution, Behavior and Systematics
- Earth-Surface Processes