hypogene
Adjective
Meaning
Formed or crystallized at depths the earth's surface; -- said of granite, gneiss, and other rocks, whose crystallization is believed of have taken place beneath a great thickness of overlying rocks. Opposed to epigene.
Source: Webster's dictionaryRelated terms
Examples
Although the features of turquoise occurrences are consistent with a secondary or supergene origin, some sources refer to a hypogene origin.
The hypogene hypothesis holds that the aqueous solutions originate at significant depth, from hydrothermal processes.
This hypogene process is applicable to the original copper sulfide deposition; however, it is difficult to account for the many features of turquoise occurrences by a hypogene process.