55.3 MB (7.3 MB compressed)
3591 x 5386 pixels
30.5 x 45.7 cm ⏐ 12.0 x 18.0 in (300dpi)
BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Tuff canyon. This steep-sided gorge has been formed by the downward erosion of lava deposits by a river which ran through the dried up bed in the valley bottom. The landscape of tuff or tuffstone was formed by the accumulation and compaction of volcanic ash following a volcanic eruption. Photographed in Big Bend National Park, Texas, USA.
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