urtite References urtite rock Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: ijoliteThe rocks known as urtite (Kola Peninsula) and melteigite (near Fen, Nor.) are essentially similar assemblages; in the former, nepheline largely predominates, whereas the latter is a variant with an excessive proportion of pyroxene. Read MoreThe rocks known as urtite (Kola Peninsula) and melteigite (near Fen, Nor.) are essentially similar assemblages; in the former, nepheline largely predominates, whereas the latter is a variant with an excessive proportion of pyroxene. Read More
