Acta naturalia Islandica - 01.07.1964, Page 39

PLATE V.
Pl. V a. Magnetite with massive
core and poikilitic margin. The
groundmass is granular. Plane
polarized light x 50.
Pl. V b. Photomicrograph to illustrate two types of texture occurring together without
any signs of intrusive relationships between the two. The plagioclase phenocryst
contains inclusions of magnetite. Plane polarized light x 15.