Peat is often found on well drained moors. It is easily cut with a knife. Peat needs good ventilation when burning. Stacked with plenty of air the peat dries rapidly and is soon ready to burn. Coal is sometimes found on the surface-there are large deposits in the Northern Tundra.
Shales are often rich in oil and burn readily.
Some sands also contain oil-they burn with a thick oily smoke that makes a good signal fire and also gives off a good heat. If you have had a mechanical failure and crashed or broken down with fuels intact you can burn petroleum, antifreeze, hydraulic fluid and other combustible liquids. Even insect repellent is inflammable Anti-freeze is an excellent primer for igniting heavier engine oils. With a little Potassium Permanganate from your survival kit, you can set it alight in a few seconds. If you have no container drain it on to the ground to use later in its solid state.