- andalusite hornstone
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андалузитовый роговик
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
Hornfels — (German, meaning hornstone ) is the group designation for a series of contact metamorphic rocks that have been baked and indurated by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases… … Wikipedia