. Bulletin of the British Museum (Natural History), Mineralogy. ANORTHOCLASE FROM NIGERIA 89 others show very fine striations (PI. 6, Fig. 2), parallel to the wider ones, which had to be disregarded in making the optical measurements. The stereogram of this section is shown in Fig. 2. When the plot of the first twin member is transposed so as to bring y to the centre, the resulting positions of the poles of (001) and (010) (see Fig. 2a) closely correspond with the positions given by Emmons' for anorthoclase.. « Anorthoclase, EMMONS • Nigerian anorthoclase Fig. 2a. The location, in the stereogr
GLIX-115-RGK036
Magyarország
Kollekció
GLIX Prime
Novel Use
Fotós / Szerző
Book Worm
Leírás
. Bulletin of the British Museum (Natural History), Mineralogy. ANORTHOCLASE FROM NIGERIA 89 others show very fine striations (PI. 6, Fig. 2), parallel to the wider ones, which had to be disregarded in making the optical measurements. The stereogram of this section is shown in Fig. 2. When the plot of the first twin member is transposed so as to bring y to the centre, the resulting positions of the poles of (001) and (010) (see Fig. 2a) closely correspond with the positions given by Emmons' for anorthoclase.. « Anorthoclase, EMMONS • Nigerian anorthoclase Fig. 2a. The location, in the stereogr