Economic and Environmental Geology

Fig. 1.

Download original image
Fig. 1. Representative polarized microscope images of standard rock samples. The same spot was photographed in three modes: open nicole, cross nicole, and cross nicole equipped with a gypsum plate. OB: Olivine basalt; BA: Basaltic andesite, OT: Olivine tholeiite; TOB: Trachytic olivine basalt.
Econ. Environ. Geol. 2022;55:309-16 https://doi.org/10.9719/EEG.2022.55.3.309
© 2022 Econ. Environ. Geol.