Surface Morphology of Basalt Columns at Svartifoss, VatnajökulsÞjóðgarður, Southern Iceland
Figure 7
Microscopic features of the basalts. (a) Planar arrangement of linked plagioclase laths is evident in this view oriented parallel to vertical axis of basalt column. Other minerals are clinopyroxene (bright) and titanomagnetite (opaque). (b) Horizontal view (perpendicular to c-axis) demonstrates abundant linkage on plagioclase laths but not with preferred orientation as in (a). (c) Scanning electron micrograph of sample surface oriented approximately horizontally demonstrates preferential orientation of plagioclase (P) in a-b plane.
