Laura Hiking in The Grand Canyon in The Snow

See Laura Hiking in Canyonlands and Arches National Parks in Utah.

Before that she was in Monument Valley and Horseshoe Bend on the Colorado River: 

I worked out that that was three and half days easy ride on horseback around 1865:

See The Searchers (1956).

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GEO Girl has a story about The Grand Canyon, or bits of a story. The thing is nobody is quite sure how or when it formed, and there is something called "The Great Unconformity" observed by John Wesley Powell, which is a piece of missing geological time in the layers stretching around a billion years or so.


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Then I saw this video about the Great Unconformity as it appears in Cody, Wyoming where they say it was caused by an uplift event. I can't help wondering whether the fault that produced the unconformity also set up the conditions for the subsequent erosion of the canyon. There is a link to some USGS mapping and an interactive geological map of the Grand Canyon in GEO Girl's video:


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Andrew "Desert Drifter" Cross made a video about the more recent archaeology in the Grand Canyon:


He was in a car accident a few weeks ago and is in intensive care with a severe brain injury:

I was watching an NTSB video about the Washington D.C. mid-air collision the other day and the Director said that there are over 43,000 people killed on American roads every year. That is equivalent to ninety two Boeing 747s packed with the absolute maximum number of passengers they can carry. Another way to put it is that every four years more people are killed on US roads than were killed in action during the American Civil War. The NTSB only employs 400 or so people and I imagine most of them spend most of their time on air traffic and railroad accidents which are only a tiny fraction of the fatal accidents. Makes you wonder what the word Transport means, doesn't it? The NTSB are acutely aware of the problem.

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