<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31481663</termId><termName>Queenston limestone</termName><termType>PT</termType><termNote><![CDATA[ A light brown or buff-colored dolostone that is well-cemented, free of jointing, and ideally suited for building purposes. It is often used as a building stone in Toronto, Canada as it is quarried in southern Ontario; Queenston limestone caps the Niagara Escarpment. Before a quarry operation was begun at Queenston in about 1840, Scottish settlers exploited the limestone beds for building materials; the present quarry is one of the oldest in Canada. ]]></termNote><termCreatedDate>2026-03-30 21:09:41</termCreatedDate><relation><relationType>UF</relationType><termId>31481664</termId><termName>limestone, Queenston</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31480813</termId><termName>dolostone</termName><termType>PT</termType></relation></term>  </Zthes>