For elemental analyses we have a Perkin Elmer Optima 5300 DV Optical Emission Spectrometer (OES).
Paleolithic paintings in El Castillo cave in Northern Spain date back at least 40,800 years -- making them Europe's oldest known cave art, according to new research.
We did not find travertine samples with U-series ages indicating a growth period during relatively warm Stages 7 and 9; due to the scarcity of old travertine outcrops, these and possibly other stages cannot be excluded on the basis of presented data.
All of these isotopic dating results concur with the field relation of the travertine complex of the Plitvice Lakes.
Read more The U-series laboratory consists of three different sections:1) a 'dirty' preparation section where small sub-samples are physically separated from rocks or sediments,2) a clean laboratory for chemical separation and purification of samples and3) the mass spectrometry section.Differential solubility between uranium and its long lived daughter isotope 230Th means that calcite precipitates (e.g.stalagmites, stalagtites and flowstones) contain traces of uranium but, in theory, no 230Th.To send this article to your Kindle, first ensure [email protected] added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Note you can select to send to either the @free.or @variations.Then enter the ‘name’ part of your Kindle email address below. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi.