GeoRef Thesaurus Lists

   List A     GeoRef Categories/Subjects covered

   List B     Age dating methods

   List C     Commodities

   List D     Chemical hierarchies, methods, and data terms

   List E     Geologic age (stratigraphic) terms

   List F     Fossils

   List G     Meteorites

   List H     Igneous rocks

   List I     Sedimentary rocks

   List J     Metamorphic rocks

   List K     Sedimentary structures

   List L     Minerals

   List M     Soils

   List N     Sediments

   List O     Geographic terms

   List P     Major terms

   List R     Rock units

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