vallée (1) neige (1) roche (1) pente (1) érosion (1) liberté (1) carbonate (1) The Valley (1) Area (1) Aerial photographs (1) Aerial photographs (1) Area (1) Snow (1) Rocky Mountains (1) Liberty (1) Joints (1) Jasper (1) Hanging (1) Gardens (1) Erosion (1) Carbonates (1) Aerial photographs (1) Size (1) Erosion (1)