Tholeiitic basalt, Plagioclase, Pyroxene Group
Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
The microstructure of tholeiitic basalt from the Schaumberg type locality.
Euhedral clinopyroxenes (greenish to brownish) in a groundmass of fine-grained plagioclase (colorless). The interstitial regions (spotty grey) are of much finer grain size and consist of chlorite (greenish grey), ilmenite (black) and magnetite (black). Thin section, plane ...
© Günter Grundmann, Detmold.