I live in Southeastern Illinois, just outside of Keensburg, an old oil mining town. I think it is crude oil soaked into the ground. The soil here is sandy and this stuff has no rock in it, just sand. This stuff does burn. After it gets hot and starts glowing red it will break up into fine particles. It will not burn without a hot flame getting it real hot. When the flame from this stuff burning starts to die down, if you break it up it will flame up again for a while. After it burns it is brown like dirt. I think the well itself has been sealed because there is a 4' cube of cement on the site. I don't think Illinois is set up as easy as Oklahoma for fixing this mess.