| as FeO. Total includes K2O 0.01, H2O 0.05. 5 Tephroite, Benallt Mine, Caernarvonshire, Wales, UK (Smith...the Mid-Atlantic ridge between Iceland and Jan Mayen. The extremely low Fa content of this olivine is...assemblages with rhodonite, pyroxmangite and tephroite of metasomatic origin associated either with adjacent...Min., 11, 15868). 6 Nontronite, Andreasberg, Germany (Brigatti, M.F., 1983, Clay Min., 18, 17786)....Sanidine, leucite-nepheline dolerite, Vogelsberg, Germany (Tilley, C.E., 1958, Amer. Min., 43, 75861). Anorthoclase |
