subsidence, potholes, seepage, karst, chuckholes, floodplain, sedimentation, flood plain, swales, streambed, gullies, drainage, depressions, flooding, wetlands, caliche, silt, fissures, diking, rills, arroyos, coquina, overwash, ruts, hardpan, groundwater, frost heaving, landslides, roadbeds, ponds, lagoons, divots, seiche, quarries, drainage ditch, topsoil, sinkage, frost heave, landslip, sediment, washouts, inundation, subdivisions, ditches, swale, diabase, soil erosion, eluvial, driveways, rockslide, overtopping, aquifer, beach erosion, igneous rock, landforms, revetment, graben, waterlines, riverbed, craters, lakes, canals, culvert, soils, embankments, winterkill, spalling, retaining wall, soakaway, erosion, berm, sewage, dune, hydrogen sulfide, shoaling, sandbars, stalagmites, sewer, creek, drainage basin, stalactites, cenote, outwash, chlorides, outcroppings, alluvium, spherules, earthquakes, leachate, marl, watercourse, excavation, anticlines, fumaroles, ruptures, riprap, boulders, moulins, mudslide, crevices, roadways, subgrade, basins, cisterns, cracks, creeks, watercourses, canyons, crevasses, moats, reefs, reservoirs, caissons, cauldrons, caves, corrals, drainages