Radiocarbon ages of organic debris from the Holocene gypsum structures along the Dead Sea shores

Published: 22-02-2021| Version 2 | DOI: 10.17632/467ggzd7ph.2
Contributor:
Nurit Weber

Description

Tables S1 and S2 list all the measured radiocarbon ages of the organic debris that were collected in several locations of gypsum structures exposures along the Dead Sea shores. Table S1: the "Cape Qedem" columnar-sections and drill core. Table S2: gypsum structures. The organic debris was prepared for graphitization. Radiocarbon measurements were conducted at the AMS facilities at the University of Arizona (14 samples), Australia's Nuclear Science and Technology Organization (ANSTO) (18 samples), National Ocean Sciences Accelerator Mass Spectrometry, USA (NOSAMS) (3 samples), and Poznan Radiocarbon Laboratory, Poland (5 samples). The radiocarbon measurement uncertainty in all laboratories was smaller than 100 y. The measured 14C (Libby) ages were calibrated by OxCal software (Oxford University).

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Sampling Organic debris for radiocarbon was collected in several locations of gypsum exposures along the Dead Sea shore. The fieldwork included detailed measurements and descriptions of cross-sections in "Cape Qedem"(Table S-1) and sampling gypsum structures along the coast without stratigraphic affiliation (Table S-2). Three cross-sections of the Holocene Ze'elim Formation were measured (Gypsum-1, Gypsum-2 and Gypsum-3), described and sampled at "Cape Qedem". The sections started close to the Qedem drillhole drilled ca. 50 m west of the tip of "Cape Qedem" (Stern, 2010). The sections were measured along lines with minimum cover by discordant gypsum structures and talus that obscured parts of the stratigraphy along the cliff. Discordant gypsum structures are scattered in several locations along the Dead Sea shores and an additional gypsum cape was found in the Tmarim shore. Four locations were chosen to describe and sample these structures, the shores of Zuqim, Tmarim, Samar and Qedem where gypsum and organic debris were collected. The organic debris was used for radiocarbon dating (in many cases the gypsum covers pieces of wood). Chronology Samples of organic debris were collected from "Cape Qedem" stratigraphic sections and from the gypsum structures. Graphitizations and radiocarbon measurements were conducted at the AMS facilities at the University of Arizona (14 samples), Australia's Nuclear Science and Technology Organization (ANSTO) (18 samples), National Ocean Sciences Accelerator Mass Spectrometry, USA (NOSAMS) (3 samples) and Poznan Radiocarbon Laboratory, Poland (5 samples). The radiocarbon measurement uncertainty in all laboratories was smaller than 100 y.