Cation-ratio dating

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   1. <skos:prefLabel xml:lang="en">cation-ratio dating</skos:prefLabel>

   2. <skos:altLabel xml:lang="en">dating, cation-ratio</skos:altLabel>

   3. <skos:broader rdf:resource="http://museovirtualfelixcanada.digibis.com//concepts/85161" />

   4. <skos:note xml:lang="en">Cation-ratio dating involves the analysis of biogenic rock varnish, a micrometer-thick coating of manganese, silicon, aluminum and iron, believed to age predictably and thus serve as a chronometer. In particular, the ratio of certain cations, (calcium + potassium)/titanium, has been posited to decrease as the varnish ages. In recent decades, some scholars have challenged these assumptions and questioned the usefulness of the technique as a reliable way to date lithic artifacts.</skos:note>

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