<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31478210</termId><termName>siliceous limestone</termName><termType>PT</termType><termNote><![CDATA[ Limestone that is rich in silica, particularly as free silica as opposed to silicates. ]]></termNote><termCreatedDate>2026-03-30 21:08:46</termCreatedDate><relation><relationType>UF</relationType><termId>31478211</termId><termName>arenaceous limestone</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478212</termId><termName>cherty limestone</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478213</termId><termName>limestone, arenaceous</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478214</termId><termName>limestone, cherty</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478215</termId><termName>limestone, sandy</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478216</termId><termName>limestone, siliceous</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31478217</termId><termName>sandy limestone</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31471258</termId><termName>limestone by composition: aggregate type</termName><termType>PT</termType></relation></term>  </Zthes>