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Related to geognosy: Ichthyolite
(Geological Science) the study of the origin and distribution of minerals and rocks in the earth's crust: superseded generally by the term geology
[C18: from French géognosie, from geo- + Greek gnōsis a seeking to know, knowledge]
geognostic, geognostical adj
a branch of geology that studies the constituent parts of the earth, its atmosphere and water, its crust, and its interior condition. — geognosist, geognost, n. — geognostic, adj.See also: Geology