<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">tufa</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31480872</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 21:09:28</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">calc-tufa</dcterms:alternative> <dcterms:alternative xml:lang="en">calcareous tufa</dcterms:alternative> <dcterms:alternative xml:lang="en">tufa, calcareous</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Calcareous, porous limestone formed by the precipitation of calcium carbonate at the vents of springs and geysers, along streams, or on the bottoms or shores of lakes. It is distinguished from travertine by generally being soft and easily crumbled. ]]></dc:description></metadata>