Saturday, 11 August 2018 22:24

A Marbling We Will Go

From Cedar Point Overlook looking across an abyss hardly more than a thousand feet wide into a solid wall of gneiss marbled with nearly horizontal bands of pegmatite, it is almost impossible to believe that a canyon over 2250' in depth lies directly in between. But, then, there are many aspects of Black Canyon of the Gunnison and its National Park that seem to invite disbelief. I was last here in 1974, when this majestic public treasure was still classified as a national monument (1933); and standing wide-mouthed above the seemingly bottomless gash of a gorge below me, I found it hard to fathom, in the waning afternoon light, why it had taken so long for me to return.

A focal length of 40mm, right on the edge of "normal," gave me the angle of view I wanted. An aperture of f/20 provided depth-of-field, and a shutter speed of 1/6 second at ISO 100 gave me an overall slightly darker-than-medium exposure.

The Gunnison is the second largest river in Colorado and the largest tributary of the Colorado wholly within the State of Colorado. For more than two million years, it has gnawed relentlessly at the igneous walls that bind it. In the end the river will chew its way to freedom.


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