Fig. 3
From: Laboratory organic matter maturation at high pressures: heat-up effect on vitrinite reflectance
Photomicrographs of run products from heat-up experiments to various temperatures T ehu (temperature at the end of heat-up) at 10 kbar under incident white light and oil immersion. a T ehu = 240 °C, b T ehu = 300 °C, c T ehu = 400 °C, d T ehu = 450 °C. The indicated value VR for each run product is the mean value of vitrinite reflectance ± one standard deviation (Table 1). T, textinite for VR < 0.5 % or telinite for VR > 0.5 % (cell wall); CL, cell lumen (corpohuminite/corpocollinite)