<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31438492</termId><termName>syenite</termName><termType>PT</termType><termNote><![CDATA[ A phanoerocrystalline intrusive igneous rock composed mostly of alkaline feldspar with or without a smaller amount of plagioclase and without notable quartz or nepheline content. The term can also refer to a granite varietal, quarried in antiquity at Syrene in Upper Egypt, in which biotite is substituted for or accompanied by hornblende. ]]></termNote><termCreatedDate>2026-03-30 20:58:11</termCreatedDate><relation><relationType>BT</relationType><termId>31438508</termId><termName>intermediate igneous rock</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31412232</termId><termName>intrusive rock</termName><termType>PT</termType></relation></term>  </Zthes>