<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">tephrochronology</topic></authority><related type="other"><topic>tephra</topic></related><related type="broader"><topic>chronology</topic></related><variant type="other"><topic>tephra dating</topic></variant> <note xml:lang="en"><![CDATA[ Dating of volcanic activity by studying tephra deposits, which include volcanic ash and other ejecta, especially in a stratigraphic deposit. ]]></note></mads>