Arizona canyon colorado colours gorge grand canyon landscape layers national park nature river rock geology strata usa boulders cliffs ravine rocks rugged sandstone stone stony trees America forest forests landscapes mountain mountains north america park parks rock Utah brachiosaur dino dinosaur extinct eye head model monster mouth natural neck nostril prehistoric reconstruction reptile tree erosion glaciere melting mount national rainer Roots snow sundland us Washington water american glacier height high ice Mount Baker peak terrain top view grand junction monoliths monument plain plateau red rock formation vertical baker cold fierce icy meltwater montane pour rivulet rock.boulder stream wild