Cinematic 4K 60 fps. Deep rocky canyon with forest in the middle. A canyon or gorge is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic timescales. Rivers have a natural tendency to cut through underlying surfaces, eventually wearing away rock layers as sediments are removed downstream. Terrain aerial view long landscape fly flying flight elevation drone erosion topography topographic geology geological softer rocks pit hole collapse area splits valleys ranges rift valley side slot very narrow largest land lands asphalt road way ground crack cracks large deepest UHD 3840×2160.