Black material on a fracture face of a conventional core from 15,424.55 MD in the Rock-Island 4H well was analyzed to determine its affinity and significance. A scraping of the black material was analyzed for organic carbon content and with Rock-Eval Pyr9lysis. Some free hydrocarbons were present and the sample was then analyzed with St pyrolysis gc (thermal extraction) to determine their composition. Finally, a whole rock polished section of the core at the fracture location was analyzed with reflected light microscopy to determine the distribution of the black material in the sample.