http://resource.geosciml.org/classifier/cgi/stratigraphicrank/group
broader |
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definition | A group is the lithostratigraphic unit next higher in rank to either subgroup or formation. A groups may consist of two or more subgroups or two or more formations or a combination of both. | ||||||
narrower |
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related |
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source | North American Commission on Stratigraphic Nomenclature; 2005; Salvador; 1994 | ||||||
type |
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in scheme | stratigraphicrank original |