Tag Archives: geological formations

Contemplation in Geology

“The Yakima Folds”
As Seen From Selah Ridge

A few days ago, we were walking along the new path of our irrigation pipeline when I stopped and gazed down through the Selah Valley into Yakima. What I saw was an excellent near ground-level perspective of the Yakima Folds. It made me stop and contemplate how the Yakima Folds were created and how they affected the way our local communities evolved.

The Yakima Folds were created 15.6 million years ago when opposing tectonic plate movement compressed the landscape, causing fold-like ridges to be created. The above image was taken from the base of Selah Ridge, north of Selah, looking down the throat of the gaps created by the Yakima River. The first set of ridges is the Yakima Ridge which separates Selah from Yakima. The second set of ridges are the Ahtamum/Rattleshake Hills Ridge which separate the city of Yakima from the lower Yakima Valley. The ridges in the far background are the Horse Heaven Hills.

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The Reef

“The Reef”
Capitol Reef National Park, Utah

Capitol Reef National Park encompasses the Waterpocket Fold. This fold runs about 100 miles north and south. It was formed 50 -70 million years ago along a fault during a mountain building period in the Western states. Movement along the fault created these monoclines rising as much as 7000 feet. More recent activity 15- 20 million years ago of the Colorado Plateau uplift and resulting erosion exposed the surface of the monoclines. As much as 10,000 feet of strata representing 270 million years of geological history has been exposed in some areas.

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Looking Back, Looking Forward

“The Badlands”
Wall, South Dakota

I’ve been laid up for the last couple of weeks and have not been able to get out and do any photographing. As such, I have been catching up on various photography topics. Jason O’Dell just put out a webcast on the Badlands that caught my eye. Jason, thanks for the stimulus. I was there for just a few hours as I drove across country from Philadelphia to Washighton. The day wasn’t the best for photography, but I was able to come up with a few that had potential. My visit was more of a scouting trip, hopefully for a return visit when I can spend the time to explore. I look back to my short visit. I look forward to when I will return.

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