Start Paleomagnetic dating technique

Paleomagnetic dating technique

The resulting chronology is based on ages at 22 heights in a ∼40-m-thick section covering the interval of ∼70–14 calendar ka BP.

This complication is often addressed through generation of U-Th isochrons, requiring analyses of several coeval samples.

In addition, presence of water-derived (hydrogenous) Th in the carbonate can cause inaccuracies in isochron ages.

This study reports a high-resolution U-series chronology of sediments deposited by Lake Lisan, the last glacial precursor of the Dead Sea.

The strategy employed combines multiple measurements from a few stratigraphic heights and fewer analyses from many heights in a single described and measured section.

U-series dating can be an effective means to obtain accurate and precise ages on Quaternary carbonates.

However, most samples require a correction for U and Th in admixed detritus.

Boundaries between the Lower, Middle, and Upper stratigraphic units correspond to the MIS 4/3 and 3/2 transitions, respectively.

During MIS 2 and 4 the lake generally showed a stable two-layer configuration and a positive fresh-water balance, reflected by deposition of laminated aragonite-detritus.

The resulting ages are in stratigraphic order, and their accuracy is evidenced by consistency of Lisan Formation U-series and C ages with the coral-based calendar-radiocarbon age calibration.

The U-Th ages provide a context to unravel the limnological history of Lake Lisan.

Dry intervals during MIS 2 and 4 are indicated by thick gypsum layers and an inferred depositional hiatus, which are temporally associated with Heinrich events H1 at ∼17 ka and H6 at ∼65 ka, respectively.