diapir

English Thesaurus

1. a domed rock formation where a core of rock has moved upward and pierced through the more brittle overlying strata (noun.object)

hypernym	:	formation, geological formation,
definition	:	(geology) the geological features of the earth (noun.object)

domain category	:	geology,
definition	:	a science that deals with the history of the earth as recorded in rocks (noun.cognition)