Sunday 3 July 2016

The great unconformity

Canyons, condors and coyotes, all those things soaked in during a childhood of American series and films. That's it, the Far West, the Grand Canyon, the mighty Colorado river about a mile down. No cowboys around, quite a few hikers instead, and families with kids and even dogs hopping on and off the free bus, lookout after lookout.

Girl, you are talking too much and walking too little, do you want a picture? Oh yes, please. Just here, on the trail of time, going back a billion years in Earth's history, and sorry for the local creationists. Mind the step, though, we have lost more than a billion years, right here at the great unconformity, where the age of the rocks jumps from 500 million years to almost 2 billion years.

And yet no picture can ever do justice to the depth and breadth of the sight. No wonder some fellow hikers thought better stopping for a while, sitting down and letting the mind drown in its smallness.

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