Assertion: zircon | /r/CapableOf | crystallize at high temperatures
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text: Such quartz inclusions are problematical for them because quartz crystallizes at a much lower temperature than zirconium silicate, raising the questions of how quartz inclusions could be there if the zircon crystallized first at high temperatures, and how could they have survived intact if the zircon has been reheated and also weathered through all the time and conditions to which it supposedly has been subjected.