Officials now say they have solved the question of what caused the burning hole in the ground in Midway Arkansas back in September. They say results of tests point to residue from four chemicals causing the orange flame burning for about 45 minutes, while shooting 10 to 12 feet into the air. The findings are similar to the contents of a Sterno warming fuel can, part sulfur dioxide, ethylene oxide, toulene and xylene. The tests were conducted by the Arkansas Army National Guard’s 61st Civil Support Team based at Camp Robinson in North Little Rock. Samples of the clay soil were taken from three different levels in the hole and sent to Camp Robinson to be tested. Authorities do not know how the chemicals were placed in the hole. What they do know is the chemicals would not normally be there.