gullies geological formations with soil erosions

background badlands barren canyon clay collapse country countryside crack crumble day dehydrated desert desertification desiccation dessicate ditch earth environment eroded erosion erosions europe formation formations geological geology gullies gully hill italy landslide mire mountain mudstone nature outdoor paleontological peak rainless ravine sand sandy scenery sludge soil surface tourism trail travel unfruitful valley view waterless weed