A dust devil picks up small dirt and dust particles. This method worked well for digging soft dirt and gravel near the street surface. Chips are washed to remove things such as dirt and sand. In addition, the gun performed better than most after exposure to rain, dirt, and mud. There may be artefacts caused by dust, dirt, condensation, or smudge. Tooth anatomy suggests consumption of gritty foods covered in particulates such as dust or dirt. He even tried driving a car along the dirt road beside the ranch. The simulation of grime, rust, dirt, and wear adds realism. Whilst driving over some rough dirt tracks the cars suffered a lot. Trails are paths that lead to jumps made of heavily compacted dirt. Mountain biking terrain commonly has rocks, roots, loose dirt, and steep grades. He eventually sighted six men standing in the dirt road. This warms the surface slightly and reduces the effect of fog and dirt accumulation. Underneath the mounds are networks of tunnels that required the excavation of of dirt. Historically, tracks were covered by a dirt running surface.