5
Coal 107 is a clinker composed of interbedded shale,
siltstone, and sandstone (Figure 18). Note the differences
in grain size, shape, and color (Figure 19). This sample is
Figure 12. Coal 36 thin section slide polarized light scan
Figure 14. Coal 88 thin section polarized light scan
Figure 13. Coal 36 Plane Polarized Light microscope image.
Quartz rich bedding layer with dark hematite staining and
slight hematite crystallization
Figure 15. Coal 88 Plane Polarized Light microscope
image. Evident angular quartz in modestly sorted sandstone,
kaolinite and hematite staining present in abundance
Figure 16. Coal 89 thin section polarized light scan
Figure 17. Coal 89 reflected Polarized Light microscope
image. microcline grains are present in a feldspar and quartz
rich matrix