https://www.usgs.gov/publications/petrographic-and-vitrinite-reflectance-analyses-a-suite-high-volatile-bituminous-coal
This report presents vitrinite reflectance and detailed organic composition data for nine high volatile bituminous coal samples. These samples were selected to...
vitrinite reflectancepetrographicanalysessuitehigh
https://www.usgs.gov/publications/understanding-and-distinguishing-reflectance-measurements-solid-bitumen-and-vitrinite
Solid bitumen is a common organic component of thermally mature shales and typically is identified by embayment against euhedral mineral terminations and by...
understandingdistinguishingreflectancemeasurementssolid