Definitionadj. produced under conditions involving intense heat
Last update: October 23, 2015
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Petrol is an igneous substance. [Please select]
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Tell you by its crystals whether a bit of stone of igneous origin [Please select]
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Ancient igneous rocks such as granite lie intricately mingled with old and highly metamorphosed sediments. [Please select]
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Traces of it are found in practically all igneous and most sedimentary rocks. [Please select]
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There are submarine mud volcanoes as well as those of igneous kind. [Please select]
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The rocks described consist principally of crystalline schists and marine igneous ejections. [Please select]
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Twenty years ago, at the date of the final publication of the New Hampshire maps, the doctrine of an igneous origin of the crystalline schist had hardly been hinted at. [Please select]
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The mountains on each side seemed to be composed of igneous rocks, but only in one place could I discover evidences of recent volcanic action. [Please select]
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