Fig. 7.

Photomicrographs of the macerals Araromi shale bar scale 50 μm. (1. White light observation of large huminite grain within mineral matter matrix in Ar-140, and 2. Blue light excitation of the same field in 1 showing threads of sporinites and resinites with yellowish fluorescence intensity, sandwiched within the huminite cell structure; 3. White light observation of discrete euhedral to subhedral grains of pyrite distributed within mineral matter and clouds of amorphous organic matter in Ar-145, and 4. Blue light excitation of the same field in 3 showing thin-walled sporinite with yellow fluorescence in the clouds of organic matter and the non-fluorescensing pyrite grains in black colour, 5. White light observation of irregular grains of huminite within mineral matter matrix in Ar-146, 6. Blue light excitation of the same field in 5 showing non-fluorescensing huminites in black colour associated with threads of sporinite in the lower bottom and yellowish fluorescensing pollen grain ? in the upper sector of the huminite grain).