GRAND CANYON II
PareByokeFORMATION THEORIES
YouTube – The Grand Canyon: How It Formed
http://www.youtube.com/watch?v=ktf73HNZZGY&feature=related
Erosive forces continue to shape the Grand Canyon today, millions of years after it began to form. Normal channel erosion alone, however, cannot explain the many kilometers that separate its rims. The strongest explanation holds that the major factor in the widening of the canyon has been activity from tributary drainage systems — the side streams, rivulets, and gullies outside the main river channel. The greatest erosive force in these tributaries is the fast-moving landslide called a debris flow.
YouTube – How the Grand Canyon formed
http://www.youtube.com/watch?v=VYmjne2y9pA&feature=related
YouTube – The Grand Canyon: Evidence of Earth’s Past
http://www.youtube.com/watch?v=XckLEPTmKjA&feature=related
Most of the Grand Canyon’s exposed rocks belong to the third category: sedimentary rock. When mineral grains are eroded from surface materials, transported by water or wind, and eventually laid down on the ground or seafloor, a loose deposit of sediments forms. Over time, these soft sediments are compacted by mounting pressure and heat from subsequent overlying layers. Squeezed of their water, the sediment grains are cemented together, or lithified, to form solid — though brittle — rock.
INTREPID ADVENTURES BRAVING THE RAPIDS!
YouTube – Rafting the Grand Canyon | HD OARS Video
http://www.youtube.com/watch?v=ISb7F-Bj_oA&feature=related
Grand Canyon rafting on the Colorado River is the ultimate adventure. OARS offers more rafting trip choices in the Grand Canyon than any other outfitter, from 4 to 19 days. It’s all here epic scenery, crystalline creeks, waterfalls, hiking, and, of course, world-class whitewater.
YouTube – Grand Canyon Raft Trip in HD – Wilderness River Adventures
http://www.youtube.com/watch?v=gAzUlqjBddM&feature=related
No exaggeration – the rafting trip of a lifetime in a 4-minute high definition overview. Last May, our videographer had the privilege of taking a raft trip down the Grand Canyon from Lees Ferry to Bar 10 Ranch. The 7-day, 188 mile expedition was aboard “Wilderness River Adventures down the Colorado River on a motor-powered raft.