_:b6925090 "(geology, mining) An unusual concentration of ore in a lode or a small, discontinuous occurrence or patch of ore in the wallrock."@en . _:b6925091 "1874, David Page, Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures:"@en . . "8" . _:b6925090 . _:b6925091 . _:b6925091 "The ore may be disseminated throughout the matrix in minute particles, as gold in quartz; in parallel threads, strings, and plates, as with copper; in irregular pockets or bunches"@en .