Radiometric Dating of Wadi Zarqa Ma’in 1, a Limestone Sinkhole Natural Faunal Trap near the Dead Sea, Using Data from Test Pitting and a Portable Coring System

Abstract

Wadi Zarqa Ma’in 1 (WZM-1) is a natural faunal trap sinkhole ten kilometers southwest of the city of Madaba in Jordan, near the Dead Sea. The limestone karst feature measures over thirty meters in maximum depth and is a significant regional source of faunal, microbotanical, and sedimentological data recording climate change and paleoecology. A new method of sampling was tested during summer 2019 involving the use of a backpacksized Shaw Portable Core Drill that allowed a narrow-bore sampling through the mixed fine sediment and boulder matrix. The maximum depth reached below surface through a combination of test pitting and coring was 8.8 m. Multiple locations could be sampled for radiocarbon analysis, and the deepest (7.85 m) sample yielded a calibrated date of 3644–3382 BCE.