Optical dating of sediments

12-Jan-2020 19:02 by 7 Comments

Optical dating of sediments - high times internet dating

By extracting sediment cores from the clam garden terrace and wall researchers are helping determine when clam gardens on Quadra Island were first constructed and how they were maintained through time.

Feldspar IRSL dates generally overestimate the age, probably due to incomplete bleaching.

We analysed single grains of quartz from several depth intervals down core Fr10/95-GC17, which was collected offshore from Cape Range Peninsula, Western Australia, from a water depth of 1093 m in the eastern Indian Ocean.

The single-grain optical ages are shown to be consistent with AMS radiocarbon ages obtained from planktonic foraminifera from the same core.

It goes on to then discuss the limitations of the technique and factors affecting reliability.

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Comparison of 1 mm multi-grain and single-grain data demonstrates that the luminescence signal of one multi-grain aliquot most likely is from a single grain.

In this paper, we demonstrate that optical dating of single grains of quartz offers an alternative means of dating deep-sea sediments.

As such increasing numbers of Quaternary geologists, physical geographers, archaeologists, and anthropologists are now relying on the results produced.

Written by one of the foremost experts on optical dating, this book aims to bring together in a coherent whole the various strands of research that are ongoing in the area.

The OSL ages have large standard errors mainly due to small sample sizes, relatively poor luminescence characteristics and uncertainties in dose-rate determinations.

At Wadi Sabra (SW Jordan) human occupation dates back to the Palaeolithic and Epipalaeolithic.

The data show that during the last glacial cycle north-eastern Finland was not glaciated until MIS 5b, around 90 ka.