Unequal Valley Development Small 320×211 Medium 640×421 Large 1024×674 Download Tiff Original 2400×1580 | (554.4 KB) Description "If the walls of the valley contain strata of unequal hardness, the form is modified by the projection of hard layers and the retreat of the softer ones." -Dryer, 1901 Keywords corrasion, unequal strata, unequal valley, valley cross section, valley development, valley formation, valley over time Galleries Geography, Volcanoes Source: Charles R. Dryer Lessons in Physical Geography (New York, NY: American Book Company, 1901)
