Posts Tagged ‘unconformity’

 “Read, every day something no one else is reading. Think, every day, something no one else is thinking. Do, every day, something no one else would be silly enough to do. It is bad for the mind to continually be part of unanimity.” – Christopher Morley

200 million years are missing from this landscape. — Photo by Pat Bean

Unconformity Along Route 66

It’s amazing how much you can learn from stopping to read roadside markers. I rarely pass one by, usually only because it’s on the wrong sign of a busy highway, and I value my life more than my curiosity.

It’s amazing what one can learn from roadside markers. — Photo by Pat Bean

That was no problem during my recent loop through the Petrified Forest National Park, where I’m not sure I even saw a dozen other cars.

The educational marker shown here notes that the basalt cap on the top layer of the cliffs was deposited five to eight million years ago. The lower valley layer, however, was deposited about 225 million years ago. What happened to the 200 million years in between?

The scientist have only guesses.

During the 1990s, I saw similar unconformities in the landscape in the Grand Canyon, when I rafted the Colorado River through it. There was a fun discussion around the campfire later that night about the missing landscape.

But just like the scientists, we rafters could only speculate. Meanwhile, this wandering old broad is left in her familiar state of wondering.

Bean’s Pat: Don’t Follow the Lights http://tinyurl.com/7avfh7v I’ve gotta visit Marfa, Texas – so I can wonder some more.

*This award is this wandering/wondering old broad’s way of bringing attention to a blog I enjoyed – and thought perhaps my readers might, too.

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