<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31438526</termId><termName>marlstone</termName><termType>PT</termType><termNote><![CDATA[ Shale that is calcareous or dolomitic and is used with limestone in making portland cement. ]]></termNote><termCreatedDate>2026-03-30 20:58:12</termCreatedDate><relation><relationType>BT</relationType><termId>31412258</termId><termName>argillaceous rock</termName><termType>PT</termType></relation></term>  </Zthes>