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Vinsamlegast notið þetta auðkenni þegar þið vitnið til verksins eða tengið í það: http://hdl.handle.net/1946/33358

Titill: 
  • Titill er á ensku Palaeoenvironmental analyses of a late Pleistocene sediment core from Jordan River Dureijat archaeological site, Northern Israel
Námsstig: 
  • Bakkalár
Leiðbeinandi: 
Útdráttur: 
  • Útdráttur er á ensku

    In the spring of 2017 two sediment cores, HULA-JRD17-1A and HULA-JRD17-1B were drilled in order to better understand the geological sequence of the archaeological site of Jordan River Dureijat (JRD). The JRD site is located in the Hula Valley, in the northern part of Israel, approximately 20-30 km north of the Sea of Galilee.
    A total of 21 samples from those sections were used for further analysis. The core matrix mostly consists of fine grained mud. Smear slides were analyzed, and sediment samples sieved. Gastropod shells, foraminifera tests, ostracods valves, and other organism remains were identified and counted. The sediment sequence was divided into two groups based on the presence of fossils, a lower and an upper part. The sediments in the lower part of the core were accumulated between 96.000 and 132.000 years (96 and 132 ka) before present (B.P.) and those in the upper part between 20 and 96 ka B.P. The lower part is dominated by ostracod valves of Candona angulata. Candona angulata prefers slightly brackish water and its habitat to be situated in a low energy environment. It can therefore be assumed that the environmental habitat at the time of the sediment accumulation is mirrored in the preferred habitat of Candona angulata. Ostracod valves of Ilyocypris are very abundant in sediments from the upper part of the core. This indicates that the environment of the sediment accumulation was a low energy, low salinity wetland. Recorded foraminifera in both the upper and lower part shows a high taxonomic diversity indicating that they have an allochthonous origin. They were likely transported from ancient marine limestones in the northwest of JRD, most likely from the lowermost Upper Cretaceous. The JRD site was apparently between 132 and 96 ka occupied by a stagnant and relatively cold waterbody, likely a relatively large lake. The conditions that existed between 20 and 96 ka was wetlands with slowly flowing streams. No evidence was found that indicates that climate conditions for the last 132 ka were different from the current conditions.

Samþykkt: 
  • 31.5.2019
URI: 
  • http://hdl.handle.net/1946/33358


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