<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31438494</termId><termName>pyroclastic rock</termName><termType>PT</termType><termNote><![CDATA[ Rock formed when dislocated and rupturing solid material is explosively or aerially ejected from a volcanic vent or rock formed when solid fragments are incorporated into moving lava. ]]></termNote><termCreatedDate>2026-03-30 20:58:11</termCreatedDate><relation><relationType>UF</relationType><termId>31438495</termId><termName>fragmental rock</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31438496</termId><termName>fragmental rocks</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31438497</termId><termName>pyroclastic rocks</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31438498</termId><termName>rock, fragmental</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31438499</termId><termName>rock, pyroclastic</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31438500</termId><termName>rocks, fragmental</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31438501</termId><termName>rocks, pyroclastic</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31412239</termId><termName>extrusive rock</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31457313</termId><termName>trass</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31457315</termId><termName>tuff</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31457318</termId><termName>volcanic glass</termName><termType>PT</termType></relation></term>  </Zthes>