This paper covers work intended to study the interplay of sedimentary
dynamics and climatic variability over the last two millennia within Tunisia’s sebkha
Souassi. Based on the Visual Core Description, and magnetic susceptibility, we date the
core from sebkha Souassi to the last two millennia. Genetic grain-size distribution then
provided a basis for the identification of six climatic stages, i.e. the Warming Present (WP), the Late Little Ice Age (Late LIA), the Early Little Ice Age (ELIA), the Medieval
Climatic Anomaly (MCA), the Dark Ages (DA), and the Roman Warm Period (RWP).
The WP stretches across the uppermost 3 cm, with a high grey scale indicating a dry
climate. The Late LIA is located between 3 and 7 cm, and the ELIA between 7 and
28 cm. Intermediate values for GS indicate that this stage may be classified as moderate.
The MCA spanning from 28 to 40 cm is marked by a sharp decrease in GS indicative of
a wet period. The DA appear along the part between 40 and 79 cm, a shift from light to
dark sediments being recorded. The RWP in turn appears between 79 and 114 cm. Based
on the grain-size distribution, two low-frequency cycles were identified, indicating radical
global changes in climatic conditions, differential tectonics and groundwater fluctuations.
High-frequency cycles in turn attest to local modifications of climatic conditions.
Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies
Informacja
SZANOWNI CZYTELNICY!
UPRZEJMIE INFORMUJEMY, ŻE BIBLIOTEKA FUNKCJONUJE W NASTĘPUJĄCYCH GODZINACH:
Wypożyczalnia i Czytelnia Główna: poniedziałek – piątek od 9.00 do 19.00