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单词 index mineral
释义

index mineral


A mineral that forms only under specific pressure and temperature conditions, and that therefore provides information about the metamorphic history of the rock in which it is found. The minerals kyanite, andalusite, and sillimanite are examples of index minerals.

Words nearby index mineral

indexing head, indexing service, Index Librorum Prohibitorum, index-link, index-linked, index mineral, index number, Index of Industrial Production, index of refraction, index patient, index plate
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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