the Mid-Atlantic ridge between Iceland and Jan Mayen. The extremely low Fa content of this olivine is...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...trapped, and many inclusions contain halite and sylvite ‘daughter’ minerals (Fig. 225). Information relevant...haüyne-feldspar ejectamenta, Thelenberg (Laacher See volcanics), Germany (Taylor, D., 1967, Contrib. Mineral |