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List J - Metamorphic rocks
The notes under Searching attempt to guide the searcher in the use of the list. Searchers might also read the notes on Indexing for further clues but should be aware that these notes reflect current practice which in some cases differs from past practice. Further notes on specific terms are in the body of the Thesaurus and additional notes on searching are in the GeoRef Thesaurus, 11th edition Introduction section on searching beginning on page x. Information specific to searching and the individual list topics is included, e.g., a section including metamorphic rocks begins on page xii.
Under Indexing the current indexing practice is given. These notes should be read along with the instructions under the individual terms in the body of the Thesaurus.
The term petrology may be used in papers pertaining to the discipline. Where the process metamorphism is stressed, it is also used.
For metamorphic rocks which are commodities, see List C-1.
For specific searches on a certain rock, use the rock name, stemmed or truncated to find variants.
For composite rock names, e.g. biotite gneiss, it is advisable to search both the specific rock name and the separate parts of the name stemmed and combined.
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